I hate to even say this but, in my opinion, he is playing you. If his feelings were that strong to begin with, he never would’ve taken anyone else’s word over yours and broke up with you. If he really wanted to be with you and loved you, he would’ve dropped his girlfriend by now. He hasn’t. He’s telling you all of this because he wants you as a backup or an “option,”if and when things fall through with his girlfriend. I say “when” because sooner or later, she will also realize that’s she’s not a priority either if he’s talking to someone else behind her back. Take a step back and look at everything from the outside for a minute. A guy, who has a girlfriend, is talking to another girl, behind his girlfriend’s back. Even if they broke up tomorrow and you two got back together, he’s most likely going to do the same thing to you. What he’s doing shows a major lack in self esteem on his part if he feels the need to keep stringing you along but hasn’t broken up with his girlfriend. Someone who would realize that they have this type of strong feelings for someone else, would drop the other girl in a heartbeat, and would be proud to be with you. She’s being played too and personally, if I were you, I would show her screenshots of texts or calls he’s made to you because, you both deserve better than him. This kind of situation is almost becoming the new normal and it shouldn’t be that way. Until people start standing up and realize this behavior is unacceptable, people are going to continue to do it.There’s a huge difference between what you “want” to do and what the “right” thing is to do. He’s currently doing what he wants to do and the part that really sucks is, how this affects the people he’s doing it too. While he’s using people to boost his self esteem, when this all comes to light, both of you girls are going to over analyze everything and blame yourselves when, this is him. It has nothing to do with you at all. If the roles were reversed and this was a girl doing this to two guys, everything I said would still apply. Stop being an option and start building up your self esteem to the point where, you don’t just think you deserve better, you know you do.