I don't really have friends. I have pleasant acquaintances I work with. I have some buds that I'll road trip to games with when we're all working the same game, but other than a get together with some other photographers for the odd lunch, I can't recall the last time I got together with someone that didn't involve business. The only social situations I'm ever involved with are either work related or because my wife wants to invite the neighbors over.
I teach full time, then teach some classes on the side, and do photography as a side business. By the end of the day, I've had all the social interaction I want.
I don't look back. I don't interact with anyone I knew in high school or college. Had a great time at both, but feel no need to go back and find people from then. I worked 20 years at Austin Fire. Had a great time. Retired and left eighteen years ago. That part of my life is over, and I have no need to go back and relive old times. Just finished twenty years at the college where I teach. Don't know how much longer I'll be there, but when I leave, I'll move on to the next thing.
I've had a couple of times in my life where I tried to go back to something I'd left, and as far as I'm concerned, Thomas Wolfe was right. You can't go home again. Every time I went back to something I'd left, all I found were shadows of the past.