He said let's hang soon but went quiet for days: what to send

A few days of quiet after he said let's hang soon is common, and it tells you less than it feels like it does. People who text casually often treat soon as a placeholder, expecting that whoever wants to make it real will do the work. If nobody did, the plan sits. The silence is mostly about inertia and the absence of a specific ask, not a verdict on you.

Read the rest of the thread for context. If his earlier messages were warm, specific, and asked you questions, the silence is probably logistics. If they were short and he never showed curiosity about you, the plan may have been polite filler from the start. Either way, you learn more from how he responds to a concrete proposal than from how long the gap is.

Soon has no shape, so it is easy to agree to and easy to drop. The fix is to propose a specific day, rough time, and simple activity, then ask him to pick or adjust. Something with two options gives him a fast way to say yes without doing the planning himself. Keep the activity low effort and the place easy to reach so the cost of saying yes is small.

Avoid tacking on a question about whether he still wants to meet. That puts him on the defensive and makes the whole message about the gap. Let the concrete proposal carry the message and the gap will look like a non-issue, which it usually is.

A clear plan also makes it easy for him to decline, and that is useful. If he doesn't reply to a specific proposal, or replies with a noncommittal line, you now know the plan wasn't going to happen without more push. That is worth knowing without having spent a week wondering.

Write the reply so that a no or a later date is a normal outcome, not a rejection. Keep it light, skip the apology, and don't add a second ask in the same message. Then let the answer, or the lack of one, decide your next step.