I think you should move on.
It seems to me that you were just a buddie to fool around with.
Then when your friend realized how fun it was, he wanted more of it so he broke up with his girlfriend and went to you.
But, I guess he changed his mind again and went back to her, like you said.
I'm sorry that he hurt you by doing all of that.
You deserve someone that will like you for other reasons than your kissing abilities.
I hope you move on and find a much better boy that likes
everything about you.
Good luck and best of wishes!
Softy