While sometimes its hard to come to terms with, the heart wants what the heart wants. And in my personal opinion, I think it would be in your best interest for yourself and your boyfriend to make these feelings known to him and tell the truth. I think of it this way- if you’re unhappy, don’t put you and the other person through the pain of trying to force something you don’t truly want. When he finally finds out the truth and realizes how long its been going on, that’s going to hurt him a lot more than when you come out and say it as soon as possible, you know what I mean? Sometimes, we hope that it’ll work out with a certain person, but it just isn’t meant to be. If you find yourself missing women and not being as interested in this guy as you were before, don’t try to make it happen for the sake of his happiness if it won’t make you happy. So in my honest opinion, I would say to sit him down and tell him how you feel about this. You can tell him that it isn’t because of who he is, or anything he’s done- it’s just not what you want. You can only hope that he’ll be understanding but I’m certain he’ll be a little upset, it’s only natural. If you’re okay with this, offer to stay friends if he wants. Just don’t act like you’re dropping him for a woman out of nowhere- just that you enjoyed dating him, but it isn’t for you.