There has never been a day in my adult life when I would have told anyone, "I've just never been a sexual person". I've always known that I've been high-desire. Your H's other statements all seem consistent with a low-desire person.

Likewise, I have never used work, stress, or tiredness as an excuse to avoid sex. If anything, stress increases my need for sexual release even further. Again, your husbands statements are clearly a case of rationalizing one's lack of desire for sex.

As for his solo activities, I'd take any activity as a positive sign, especially given his statements about himself.

Don't take any of his behavior as a reflection on you in any way. That would be a big mistake.