sex hurts

I feel like I'm a weirdo because anytime I have sex, it hurts! I really don't enjoy sex, it feels like more of a chore for me... and it makes me sad/frustrated because I always hear girls talking about how much fun it is, and how good it feels... but I just don't feel the same. like it's painful for me. I'm just wondering if I'm the only one, or if other people have the same problem?