If he does talk about such feelings, you should reward him and not reject him. A man's worst fear is that he will appear weak in a woman's eyes. If you believe that I have a bridge in Brooklyn I want to sell you. I think you need to have a talk with him about boundaries in your relationship. The frequencies of sex can vary from every day to once a month.
Every couple has their own style and frequency.
The problem is when one person wants it more than the other. Mixed signals and sexual and romantic communication is one of the perplexing things to study, particularly in this age of sexual harassment and political correctness. I encourage people to use words and be very precise. Communication is the key. I do not see America maturing in its sexuality for at least another 100 years.