What does it mean if a girl suddenly stops texting you?

A gap of a few hours means very little. A gap of two or three days after a conversation that was warm usually means she got busy or let the message slide, and it is rarely a verdict on you. The thing to watch is whether her replies were getting shorter before the silence started. A slow fade, where she goes from full sentences to one word and then to a thumbs up, is a clearer signal than a sudden stop. A sudden stop right after a plan was made can mean she's not sure she wants to meet, or that something came up and she's embarrassed about flaking.

Look at what the last message from her actually was. If she made a plan and then went quiet, the silence may be about the plan and not about you. If the last thing she sent was a joke or a question, she probably intended to answer and got pulled elsewhere. Reading this takes thirty seconds and tells you whether to wait, follow up lightly, or let it go.

The mistake most people make is turning the silence into a question they need answered. They start building theories, reading her old messages for hidden meaning, and wondering whether she's seeing someone. That mental work leaks into the message they send, and it reads as pressure. A better frame is to decide in advance what you want from the next exchange. For most people the goal is simply to find out whether she wants to keep talking, and a light message that references something real from the conversation does that without any drama.

The referenced detail should be something she said, not a generic check in. Pick up the thing she was excited about or the plan she was into. That tells her you were paying attention, gives her an easy thing to answer, and makes it clear you're not hanging on her reply.

When she comes back after a gap, the timing of your reply matters almost as much as its content. If she messages at a normal hour and you answer within a few hours, you look like someone with a life who is happy to talk. If she comes back late at night and you reply instantly with a lot of energy, you can come across as available in a way that signals you were waiting. Matching her pace is a decent default. Let a few hours pass unless the conversation is clearly live and moving.

If she goes quiet again after you've replied, stop there. One follow up after a long gap is reasonable. Two is pushing. Three is the point where continuing reads as needy and tends to end the thread for good. Letting it rest is often what gets a reply weeks later, because she isn't being chased.