Im starting to think my man doesn’t find me sexually interesting...

We’ve been together for 3 years and I’ve only wanted him. Sexually we were great in the begging. Now, sexually it’s getting down to a few times a month and even then, it’s only a small percentage of the time he lets me come with him. That’s an overstatement. He never holds himself out for my orgasm. So MAYBE once every two months with myself alone. Less. How do I help this situation?