I am very sorry to cause hurt to you :(

I really want to let you know the real cause of the problem, I'm not taking the blame or whatever, but just listen to me with a calm mind... The problem that I need to solve myself is that I need to have self-esteem and self-confidence in myself. 1 year and 4 months back... when you accepted me as your boyfriend... I was really confused and I cannot believe that I have a girlfriend... because in the past I have low self-confidence, afraid of whatever I do. And when you were in poly you have a lot of male friends... it's not actually the male friends I hate... Its because I feel inferior and I keep thinking I will not treat you better than they do... I'm afraid that your male friends treat you better and I do not and feel like a loser... that's why I'm very controlling and protective when you talk or hang out with them... :( It's only after we broke up then I really find out why I'm so protective...I tell myself that I need to have better self-confidence after this.. I hope you understand that you should not take the blame all yourself.
In process of being a more confident guy :)

:)