Relationship tea ?

So me and my boyfriend been together for 4 years but the sexual flame is not there... well for me. My boyfriend claims he's freak nasty but I'm pretty sure I'm higher in that catergory. When we first started he wanted to pleasure me orally no matter what but now years gone by it seems like I'm the only one giving. He says he lost interest in doing it🙄 and he acts so lazy when I want some 🍆 and 👅 but is full of energy and courage when he wants oral. What should I do so I won't step out my relationship because this has been happening for awhile.