Have you thought about flipping the script here. Stop doing all the stuff you do for her. It almost seems like you're her slave or something. How does she treat you, besides sex? Is the relationship good? If you are constantly doing stuff she wants and catering to her and always asking for sex and she still rejects you... well you've made it too easy for her. She knows she can have you whenever she wants and she might be "subconsciously" testing you to see how poorly she can treat you and see if you still keep serving her. I would shut it down entirely for now.
