“I’m ready to lose my virginity, but my boyfriend isn’t”

I used to be abstinent. After some thought, I decided that that is not important to me¬†anymore. I’m still a virgin, but, if sex happens, it happens.

My boyfriend and I have been together for four years now, and he refuses to have sex with me because of “my beliefs.” It’s been years since I told him I no longer believe in waiting, but, he absolutely will not have sex with me. What do I do?