Is it me?

Wi

My boyfriend says that I sexually exhaust him but we barely ever have sex anymore. I'm still coping with the sexual abuse from my marriage and the four year relationship before that. Him saying no feels very much like rejection and takes a serious toll on how I see myself and how I think he sees me. Even though when we do have sex he makes me feel very loved and wanted. I'm not sure if it's from the past abuse, the age difference (14 years), if my sex drive is too much, or if it's attraction related.