Falling out of love? 😔

I’m petrified that my fiancé is going to start feeling like he doesn’t love me anymore,, we haven’t had intercourse in just over a month now and it’s making me feel really bad that I can’t meet his need.. I was in a bad relationship with my ex for 2 years and Physical and Sexual abuse was very common and I’ve had a lot of bad dreams and it’s scared me so much.. but because of what my ex done to me I just can’t bring myself to do anything with my fiancé but im beginning to make myself feel that if I don’t have sex with him.. I’m going to loose him..