I had a guy cry on my shoulder once in my late 20s about a fight we had in middle school. Had no idea it bothered him as much as it did; I knew he didn’t want to fight as much as I didn’t want to. [we were coaxed into fighting by a large circle of kids into a chicken fight – even teachers were cheering from the windows which felt like a betrayal).
Anyway, I comforted him about it and he felt better.
If it makes you feel better, reach out. You might get doors slammed in your face or you might get “what that?” or you might get “Well, you should be sorry.” or something entirely different.