Deserve Better

I was talking to this guy who has a girlfriend (I know I am awful). But he made it sound like he was unhappy with her and that he was going to break up with her. Saying how controlling she is and how she says horrible things to him. (He can't even speak to his coworkers cause she will freak out). So we were talking over email. He made a fake email because she looks through his phone. And we were talking like that for about a month. However, as we kept talking he started contradicting himself... The last emails we sent to each other was him saying that he isn't always unhappy with her some days he is happy with her and that he doesn't know what he wants (meaning to be with me or stay with her) and I realized how ridiculous I was being. That I was not only degrading myself but also hurting this other girl who had no idea what her jerk of a bf was doing. And I felt awful since I kept talking to him. So I called it off. I told him he needs to make a decision, that I'm not communicating with him until he figures it out. I actually said I never wanted to speak to him again even if their relationship didn't work out and he became single.. he was pretty upset and kept trying to convince me that it would be "better" or "smarter" to keep the door open. I told him that I deserved better and that he should have never pursued me if he wasn't planning on leaving his gf.