Having trouble making this decision?

I've known that I have been attracted to women my whole life, and I choose not to label myself, due to; 1. The constant confusion and 2. It doesn't matter to me, I like who I like, I don't need a label. Over the past year or so, my attraction to guys has diminished to the point where the thought of being with a guy kinda grosses me out, and my attraction for girls has increased, alot. :) But just recently I've been talking to this guy and I'm starting to really like him. The heterosexual sex still seems wierd, but I kinda want a relationship with him. I really do like him, but I can't help but think of what I'd be missing with girls if I dated him. I really don't want to give up girls, but I really like him. So, what should I do about all these feelings?