Most Helpful Girl
You can't stop anyone from doing anything, don't expect them to change just because you don't like their behaviour :3 and don't wait for them, because you'll be wasting time.
But to answer your question, you feel the need to talk to him because you miss him and you've grown to have a habit of missing him and talking to him. This is how much you rely on him. If you want it to go away just focus on something else, have fun with your friend :3 do other things and it'll go away. and maybe if you just be yourself and stop thinking about him, someone else will come around.
Well good luck :)