Subject: I don't enjoy sex and feel pain

I have had sex many times with my boyfriend and everytime I feel odd and don't enjoy it. When I masturbate I usually feel good and actually have orgasms but never with any dude. Sometimes I feel pain. We have tried other positions but they all just don't give me any satisfaction and when does the discomfort and pain go away? When do I start enjoying sex? It's been over a year.  

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