How to get over waiting for a text?

The first thing to check is how she usually replies, not how you wish she would. If she has answered within the hour all week and today it has been six, something has changed, but it could be as small as a long meeting or a dead phone. If she has always been slow, a six hour gap is normal for her and tells you nothing new. Scroll back through your thread and look at her typical response time, the length of her messages, and whether she ever starts conversations. A person who is interested usually shows it in a few ways across several days, not in one reply.

Also look at what your last message asked for. A question with a clear answer like a day or a time gives her an easy yes or no. A message that was more of a statement, or that ended with a vague "lol", gives her nothing specific to respond to, and silence is a common result. That is not a failure on her part. It just means the next message from you should be easy to answer.

Getting over the wait is mostly about what occupies you during it. Put the phone in another room for an hour, or switch it to do-not-disturb so the screen is not lighting up with other things. Make a plan that does not depend on her, like seeing a friend, going to the gym, or cooking something you actually want to eat. If you notice your thoughts drifting back to her, let yourself notice it without acting on it, then return to whatever you were doing.

The point is not to act unbothered for her benefit. She will not know whether you are checking your phone. The point is that your evening should still be worth having if she never replies that night. When your mood depends entirely on one text, every minute of silence feels like a verdict. When you have other things going on, the silence is just a gap.

If she has not replied by the next day, one follow-up is fair, and it should be light and easy to answer. Pick a new angle rather than repeating the first message, such as a specific suggestion for the plan or a new small question. Keep it shorter than your original text and avoid anything that mentions her silence. Then stop. Do not send a third message, and do not send anything that tests whether she is still there.

If she replies warmly, pick the conversation back up at a pace that matches hers. If she replies with something flat, or does not reply at all after a couple of days, treat that as an answer and move on. Keeping a dead thread open costs you attention you could spend on people who are actually responding. Your phone will feel less important once you stop waiting on one name at the top of it.