Gay Cis Male at age 45 no longer liking males

You sound depressed. See a doctor, you don't have to stay like this, depression can be treated.

I'm with Izzy. These all sound like symptoms of depression. Note: neither of us are doctors, but what you're experiencing is 100% treatable. Please see your doctor. S/he can absolutely help you.

Same with your intestinal issues. Ask your doctor about Miralax or some equivalent thereto. It's over the counter. And no, I don't work for them.

Also, some aches and pains are pretty normal for aging. We get arthritis or something tears. We definitely need more sleep and better nutrition. I am 11 years older than you (and female) and I get backaches a lot of the time. A better mattress, a better desk chair, more exercise, and better sneakers all helped me -- A LOT. So also ask your doctor (while you're there) about physical therapy. Even if you just go to one session, ask the PT about stretches and exercises for your posture. The older we get, the more we need to think about functional fitness. That means being able to get high stuff off shelves, regain our balance if we teeter, and getting up off the floor without assistance.

You don't need to suffer.