<human>: 21 M, 20 F

My boyfriend and I have been dating for a little over a year.  In the beginning it was great, and I still love the time I spend with him, for the most part.  However I find myself being unhappy with him over little things more and more often.  I also catch myself thinking about other guys.  

I don't think it's fair to him for me to stay in this relationship however I'm really worried about his well-being if I break up with him.  He is very deeply in love with me, and has told me he doesn't know what he would do if we ever broke up.  He doesn't have a lot of other friends.  I don't want to hurt him, and I don't want him to do something drastic if I break up with him.  I feel like he would let his life slip away, health wise, socially, and he may get heavily into drugs. I don't know what to do.

Can you condense the text into a few key points?
<bot>: I don't know if I should break up with my boyfriend, I don't know how he will react, I'm scared he will freak out.