Some people just have a higher need for sex than others. It sounds like you don’t like sex as much as you say. Like something from your past is causing these feelings. Consider talking to a sex therapist or counselor. I’ve been married for 12 years. This behavior will cause problems for your relationship long term. He’ll eventually start looking elsewhere if his SO acts like she doesn’t care about his sexual needs. Sorry if this sounds harsh but it’s the reality. Everyone has needs. Just because you don’t understand or agree with his needs doesn’t mean it’s his fault. It’s more you than him. No matter how much love there is in the relationship, sex is still very important and both people need to be on the same page or it just won’t end well.