I don't love my long distance boyfriend anymore, how can I tell him?

That's a difficult one to answer. As much as it sucks, I'd say break up with him. Sometimes you need to make a long distance relationship work for a little while for someone you love, but a long distance relationship at your age for four years is a little extreme. I understand you feeling bad about breaking up with him. That's never a fun thing to do regardless, and the other concerns make it enough more difficult to do. Honestly though, if you don't break up with him you are probably going to hurt both him and you. If you're not in love anymore, you are either going to cheat yourself and not look to find that with someone else, or you are going to find someone else and hurt him even more.

Not an easy decision, but I would say just break it to him gently. Tell him you need someone to be by you, so a long distance relationship isn't working for you anymore. Telling him something along those lines will let him know that it wasn't his fault, which won't make it not hurt, but it will soften the blow a little.