What should I do if I haven’t heard from my crush infor a few days?

You may feel anxietyous when your crush doesn’t giverespond to you positive feedbackly.

You may ask, why do I need to keep missing a guy and someone when they doesn’t even give me a clear signal.?

Trying to keep things gender neutral, but if that's not your intention, then ignore that part of the edit.

I think you should think about if your crush actually have some heartbeat tos any interest in you or not.

If the answer is no, you better leave and stop trying, or at least it is better to wait for his news and messagestheir response first.

Don’t be a licking dog,suck-up; you can just talk withto your crush directly to get an answer or leave.

I'm assuming "licking dog" is a literal translation of 舔狗. If you don't mind internet slang, "simp" is probably more accurate.

Staying and waiting for a long time doesn’t make any sense.