Your not married and if sex is something you enjoy and desire, leave. Or be willing to spend the rest of your life trying to figure out what is wrong with you. When you are a perfectly normal healthy adult women. Sex gets better and better for women. Men peak in their teens, women in their 30's. If you love him and want to stay, buy toys, please yourself. Maybe he'll join you. Sex is a power struggle for some. The more you ask the more they don't. The other responses I can also agree with. It depends on how important it is to you, only you can make that decision.
I wish you all the best