A late comment, but what do you honestly expect? Friends with benefits is a good idea, but is often hard to properly manage because someone, as you are, often is getting emotionally attached to the other in the agreement. He just wants to get his winky wet. You want something more. You don't want a FWB arrangement, you want a significant other. That's fine. What hurts is that you're expecting him to feel the same way. Which he obviously doesn't. You're expecting him to have developed the same feelings you did and he didn't. That is probably the part that hurts.
I don't know what your intentions were when you first started this arrangement. I don't what your secret intentions or hopes were either. I don't know if you expecting this to turn out differently or not. The problem is now that you know that this isn't going to turn into a relationship. It is really sounding like you're more in the market for a relationship instead of a FWB. I would suggest either terminating this arrangements or lowering your expectations to his. You're also going to to figure out your emotional needs and find that outlet as well. That's going to be the hard part.
I am also assuming that you've also had the protection/STI talk with him so I won't go into that.
