Don't enjoy sex?

I don't know what it is but everytime me and my boyfriend have sex I feel nothing. From oral, to penetration, to EVERYTHING, I don't feel anything. We've tried multiple positions and still nothing. I feel him going inside me but I don't feel any "feeling" or "sensation". Even on my clit he will rub it or go down on me and I still don't feel good from it. I've never orgasmed with him, only by myself when we finish with my vibrator. Help I'm getting frustrated I want him to make me orgasm!!