Husband doesn't want to have sex

I've been with my husband now for 8.5 years. We have been sexually active for like 6 of those years, but it was never regular. We just got married 6 months ago and I can count the number of times we've been sexually active since on 1 hand... I can't even remember the last time we had sex. I think it may have been back in October or November? I understood at first why we weren't as sexually active: condom was originally our only form of birth control and we really really REALLY didn't want to get pregnant. Now, I've been on birth control for 2 years, we use condoms, and we are married. He's just never trying to get some. I am constantly trying to initiate sex, but he never takes to it. I rub him, I kiss places that turn him on, I constantly make references to having sex, join him in the shower, but still I get nothing. He's my absolute best friend, but it makes me feel like he's not attracted to me anymore. When I say that, it causes nothing but problems and upsets him. Any suggestions to get our sex life on track?