It can be an emotional problem though. If you typically have five to ten, you are way above normal. I am not sure when you say sexual peak if you mean orgasm or if you mean you are not sexually aroused. Sometimes, guys get so focused on pleasing their partner that they forget about their own pleasure. That is hard to answer.
Breakups can be for many reasons.
My husband says his sex drive is diminishing. He's only 37. He said he's noticed it declining for several years. We used to have sex three and four times a night, and now it's maybe once a week. It is normal for sex frequency to drop off, but a drop off like that is pretty severe.