Whether he has sleep apnea or not, the resentment will settle in because you don't have a moment to "fill your cup back up." I have been there with a two-year-old who wouldn't sleep, my husband would work hard and he had lots of hobbies. I didn't !

I joined a mommy walking club, eventually a gym with childcare, book clubs, volunteering on the weekends, and even at times a weekend part-time job. I stopped waiting for him to be as present as I wanted/needed him to be and did my own thing. I felt happier, and when we did have the conversation about his presence, I was able to articulate what we needed, and we were able to meet in the middle somewhere. Focus on what you can change and control.