What should I do?

Okay, me and my SO have been together for almost 2 years. Lately when we have sex all he wants is anal and it's all about him getting off and he could care less about if I do. He never even tries(he knows the exact way to do it). After we get done he's been telling me "thank you for your services" and then goes to bed. I don't really know how to feel about it. Like it truly hurt any feelings but then again I am scared he's gonna be mad at me. What do I do?? 😫