Unable to enjoy sex with my partner.
Hello, I'm 20 (female) and have been with my current boyfriend for over a year.
I've been having sex since I was 17 and never truly enjoyed it much. Myself pleasure goes back to around 12 or 13 and with premature exposure to porn, I was shown some by a friend when I was 12 and after going home from her house felt so dirty and bad, but mainly overwhelmed. As an incredibly curious child I kept searching for porn and have seen it all. I've also had strange men expose themselves on the camera online. I started masturbating a lot, it got up to the point where I'd do it so much I'd get bruised from my (very short) fingernails.
The first time I had sex it was sort of consensual, I was so stressed from him asking me to have sex I mumbled 'ok' and he just went for it without verifying again. I was also previously to this sexually assaulted and forced to give head to a guy I went out with.
Anyway, that was just to give a bit of background, currently I'm with my 22 year old boyfriend, very very handsome and I'm completely attracted to him. I've been through a lot of stressful changes through this year, and I did, for the first time enjoy sex a few months ago. It was with him and I enjoyed it physically and in every other way.
Since then I stopped enjoying it. I might feel horny before meeting him and even while being next to him, and then just when I see he is making a move in the direction, even stroking my shoulder in a familiar manner. I stress out and start to feel somewhat nauseous and anxious like hell. The whole thing feels like a chore and I don't enjoy a moment of it.
I know it's not him, I'm super attracted to him, he does a lot to try and get me going and I love him deeply. Any ideas why this happens? Also, how to solve this?