Y am i finding being intimate so hard?

[Jennifer]

Hi ppl, im 22 years old and have never enjoyed sex or being intimate as i was raped when i was 15. So i have always hidden away from sex and being intimate. I have been with my fiancé for 5 years and he is the best thing that has ever happened to me, he knows about my past and has been very understanding. But the lack of sex and being intimate is starting to put pressure on our relationship. We have a son, last year i suffered from a miscarriage and now i am 12 weeks pregnant, my fiance wants to spice our love life up and wants to have more sex and become more intimate but im finding this very difficult, i don't enjoy sex its just something that i do to satisfy him. I do not want to loose him or him to go else where but fear i might as he is not being fully satisfied. What can i do to enjoy sex and become more intimate? Please help