Boyfriend vs. Lesbian Identification

I've been dating this guy for about six months now and the relationship is wonderful. We communicate wonderfully and I have no complaints about him. The only issue is I identify myself as a lesbian and even came out to my family some months before dating him.

To keep a long story short, he wooed me with cute CDs and handpicked flowers (what girl could resist) and now we enjoy a great relationship. I feel bad because, despite how good everything is, I've had a hard time adapting to a heterosexual relationship. I have been with a girl before, though I've never been a relationship with one. And as soon as I felt comfortable enough with myself and my family to date someone of the same sex, I fall for a guy.

He knows I came out, but I don't think he knows that I still identify myself as gay. I was even embarrassed to tell people that didn't know I was gay that I had a boyfriend. Even after six months it still feels weird.

I've just been so confused lately. I mean, our sex life started out great, but now I just don't find him sexually attractive. Emotionally, though, I'm head over heels. I hate giving up a great relationship just because of my sexuality, which is why I gave him a chance in the first place. I would be fine with continuing a no-sex relationship but, understandably so, I feel like he'd be really upset because I'm not attracted to him. Plus a healthy sex life is good for a healthy relationship. I just don't know what to do I'm running out of excuses as to why I don't wanna have sex, but I just don't have the heart to tell him.

:help: