Thank you for your replies!
I don't want to say too much about what happened recently, but basically I found out how my ex has felt about me since our breakup (and so did the rest of the world...) and it's not good. I didn't cheat on him or anything like that, but it was a push-pull relationship because I was so messed up due to past experiences, and I'm sure it drove him crazy.
Anyway, how he feels is his business. I'm just glad, in a way, that I got this trigger so that I can finally deal with my own issues concerning that relationship and finally move on myself. And I'm glad to see there are such lovely people here to help me through it