Why do guys go back to their ex-girlfriends?

Anonymous
I was really into this guy, and the day I actually made some moves, he went back to his ex. I mean we're young and I know they dated for about a year, but I heard she was bit of a loony. What drove him to go back? Besides the connection they must of had, though he even said they had grown apart. I mean, don't people break up for a reason? What's the psychology behind this?
Updates
+1 y
It just sucks in gerneral. =/
Why do guys go back to their ex-girlfriends?
3 Opinion