How to comfort an insecure girl?

A message like "lol nvm it's fine" is a door she's half opening and half closing. The lol and the nvm are there to make the thing sound small, so that if you shrug it off she doesn't have to feel rejected, and if you take it seriously she can still back out. The line "forget I said anything" is the clearest signal: she's already anticipating that she's been too much.

You can tell the real worry from the surface one by what she names. If she mentions a specific thing you did or didn't do, the worry is about that thing. If she says something vague like "you were probably busy," the worry is about where she stands with you in general. Those need different responses, and the vague version usually needs you to say something about the connection itself, not the logistics.

The first kind names the feeling without argument. It's short, says you can see why it came up, and doesn't ask for more. Its job is to show she's been heard. A draft is this kind if it could be sent to someone who had any reason to feel that way. It should leave out any reason she shouldn't.

The second kind answers the actual question underneath. If she's worried you're busy or losing interest, it says where things stand in plain terms. Its job is to remove the uncertainty she's sitting in. Leave out promises about the future and anything that sounds like a negotiation.

The third kind brings things back to something light and warm, after you've already acknowledged the feeling. It works only as a second beat, not a replacement. If it shows up alone, it reads as dodging. Leave out jokes that mock the worry itself.

Send the reply while the conversation is still warm and you can match her energy. If it's late and she's sent something vulnerable, a short reply that says you'll talk properly tomorrow is better than a long one written half asleep. Sending a long considered message at 2am can read as either panic or a performance.

If she doesn't answer within a few hours, don't send a second message explaining yourself. One follow-up the next day, lighter in tone, is enough, something that picks up a normal thread and doesn't reopen the worry. If two days pass with no reply to that, stop chasing and let her come back to you. Continuing to push past that point turns comfort into pressure, and she'll read it that way.