There are few things more effective at provoking curiosity than a message you never get to read. An old acquaintance sent me one late at night and deleted it before I could open it. By morning, WhatsApp had helpfully informed me that a message had been deleted. Someone had thought of me, reached out, and then changed her mind. All I had to show for it was a notification and an unreasonable number of questions

We had not been in touch for over a decade. There had been no quarrel, no dramatic falling-out, no final exchange of words that either of us might have replayed over the years. We had simply drifted out of each other's lives, that most ordinary and oddly permanent way of losing people. One day, someone knows the details of your life; a few years later, you would not know whether they were happy, lonely, ill, in love or simply getting through the week.

And now, apparently, I had crossed her mind. For a moment, at least.

What followed was a ridiculous amount of speculation about a message I had never read. Had she wanted to say hello? Was she in trouble? Had something happened in her life that made her reach for someone from the past? Was there something she had wanted to tell me for years? Or had she sent a perfectly ordinary message, reread it, decided it sounded foolish and deleted it?

There was, of course, no way of knowing. Yet I found myself trying to solve the mystery as though the fate of a small nation depended on it.

That is the trouble with silence. It leaves the facts untouched but gives the imagination an extraordinary amount of room to work. A message that never existed for more than a few seconds had managed to reopen a relationship that had been dormant for years. I was no longer merely curious about what she had written. I was curious about why she had wanted to write at all, and what had stopped her.

More uncomfortably, I began wondering whether I would have done the same.

How many times have we thought of someone, opened a chat window, typed a few words and then deleted them? How often have we wanted to reconnect but hesitated because too much time had passed, because we did not know what to say, or because we were not entirely sure the other person would be pleased to hear from us? We tell ourselves that we are being sensible, that there is no point disturbing the past, that people move on. Sometimes these are perfectly good reasons. Sometimes they are simply fear dressed up as good judgement.

The peculiar thing about reaching out is that the message itself is rarely the difficult part. It is everything the message might reveal. That we miss someone. That we remember them. That we have been thinking about them when they may not have been thinking about us at all. A simple hello can carry the embarrassing weight of an admission: you mattered to me, and perhaps you still do.

It is much easier to remain silent. Silence preserves our dignity, or at least the appearance of it. If we do not reach out, we cannot be ignored. If we do not ask how someone is, we do not have to discover that their life has moved on without us. And if we delete the message before it is read, we can pretend we never made ourselves vulnerable in the first place.

Technology has made this retreat almost absurdly convenient. We can locate people we have not seen in twenty years, inspect their lives through photographs, type a message and erase it before they have the faintest idea we were there. We can mute conversations, archive relationships and leave people on read with the efficiency of someone clearing an inbox. The machinery of connection has become so sophisticated that even our avoidance requires very little effort.

Yet the ease of contact has not made us any more comfortable with the business of connecting. We can send a message across the world in seconds, but we may spend weeks wondering whether we should. We can reach hundreds of people with a single post, yet hesitate to ask one person a question whose answer might matter to us.

And while we are busy managing these carefully controlled encounters, the relationships closest to us can suffer from a different kind of silence. At home, we exchange information rather than conversation. We discuss bills, meals, appointments and who is picking whom up, often believing that because we share a life, we must also know what is happening inside one another. We become so familiar with the people beside us that we stop being curious about them.

Then someone from far away calls on a difficult day, asks how we are and waits long enough for the rehearsed answer to fall away. Suddenly, we find ourselves telling a person we have not seen in years what we have been unable to explain to someone we see every morning. Distance, it turns out, does not always diminish intimacy. Sometimes it removes the assumptions that have quietly crowded it out.

Of course, not every silence is a tragedy, and not every old acquaintance needs to be welcomed back into our lives. Some relationships are better left where they ended. Silence can be a boundary, a kindness or the only sensible response to a connection that has become harmful. We owe nobody unrestricted access to our time, attention or emotions. But there is a difference between choosing not to reconnect and letting the possibility of rejection make the choice for us. One is a decision. The other is a retreat we may spend years explaining to ourselves.

Perhaps that is what troubles me about the deleted message. Not that an old acquaintance may have changed her mind, but that I will never know whether she wanted to reconnect and lost her nerve. I will never know whether there was a moment when she decided to cross the distance between us and then thought better of it. And I cannot help wondering how many relationships have been quietly abandoned, not because either person stopped caring, but because neither could find a way to say so.

We tend to imagine that relationships end with arguments, betrayals or some recognisable final act. More often, they fade through a succession of small postponements. We will call next week. We will meet when things are less hectic. We will write when we have something interesting to say. Eventually, the years accumulate, and the effort required to bridge the distance seems greater than the effort required to leave it alone.

Silence becomes convenient. And convenience, when repeated often enough, begins to resemble a choice. I still do not know what my acquaintance wanted to say. I could message her and ask. I could wait for her to try again. Or I could do what we have all become rather good at doing: accept the silence, invent a reasonable explanation for it and get on with the day.

But I keep returning to one uncomfortable thought. Perhaps she was wondering whether I would welcome her message. Perhaps I would have been delighted to hear from her. Perhaps, in the time it took her to type and delete a few words, we both lost an opportunity neither of us knew we wanted.

If someone from your past crosses your mind today, it might be worth sending that message. Not because every old relationship must be revived, but because we are remarkably good at finding reasons not to do the small things that might matter.

We tell ourselves that the other person has probably forgotten us, that too much time has passed, that there is no point disturbing the quiet. We protect ourselves from the possibility of rejection and, in doing so, sometimes guarantee the very distance we fear.

The other person may not reply. They may have moved on. But they may also be sitting somewhere, wondering whether they should get in touch with you. And perhaps the most inconvenient truth about silence is this: sometimes, neither person wants it. Both are simply waiting for the other to break it.