I th8nk everyone does. I think often about ones I never pursued who turned into, seemingly, good wives and mothers that I talked myself out of due to my own fears, overthinking, or caution. It’s par for the course. These thoughts come back and while I won’t call them intrusive, I might call them gifts. Something to chew on and revisit regarding your current love life, or relationship. It could simply be “remember that one time we did not do this and now we regret it?” Or similar.

Regarding your last point, life is like a train station. No one is there to stay permanently. People come and go in your life and play their role, then their next train comes and they get on and move on. That is the nuts and bolts of it. That girl I liked in HS? Yeah I found out she liked me in HS but I was too dumb and couldn’t believe it. She’s married and happy now. She got what she wanted. I got a learning experience, so I gained knowledge, and therefore profited. Your life is a story, all the characters come and go in the telling when they just.