I'm 43 and I'm about the happiest I've been in my life. I say that not to boast, but to say that putting some sort of restriction on your life because of your age is a bad way to frame things. It's never to late to try and build something that brings you joy. I've found my people where I live. I make an effort to see people and go out. The vast majority of weekends my wife and I are at home but we make an effort to host fun parties a few times a year. I find having a fun experience like that once every couple months does wonders for my mental health. Yes, I am very tired some times. And at this age, sometimes it will take 2 or 3 days to recover from a "late" night (that term has changed dramatically as we've aged). This isn't drinking related, I just can't sleep past 6:30 am.

It makes me so sad to see people basically give up. Therapy is a great start. You only have one life. Get out there and live it!