Not enjoyable

I find sex appealing, I get turned on when someone touches me in the right places but when it comes to actual penetration it doesn't feel good    My vagina just feels uncomfortable half the time we are having sex. I could go for ages and not get anything from it, really the only thing I think about when I'm having sex is getting my partner off and then it'll be over and done with? I've been sexually active for a while now and I've been with different partners too. I'm jealous of all the girls who find sex the best thing in the world. Why doesn't it feel that good for me?! 😫😫