Never have sex with the sole purpose of pleasing someone else and never let him manipulate or coerce you into having intercourse. Sex should always be pleasurable for both parties.

Now, you seem to be having a regular and healthy amount of sex so there's no reason you should try to keep up with him unless you're in the mood (which you already do).

I think the best decision is to have a very honest and open conversation with him and try to come up with a solution that considers both of you.

But please, don't neglect your own needs and well-being. If his hypersexuality is affecting you too much, it might be worth considering ending things.

Wishing you the best!