You deserve to be with someone who cherishes you and is proud to have you, I have been in a very similar situation, I was feeling mistreated so I ended the relationship, a few weeks later I went to Europe. While I was in Europe I found out that he was dating a girl that i knew, and had asked him about several times – he had assured me that there was nothing between them.

For you it is best that you’re free from the relationship and soon you’ll be able to break free of the thought of him. If he dated a girl 2 weeks after the breakup, he was most likely seeing her while seeing you – that’s so awful but it reflects badly on him. You’re the person who will grow from this relationship while he continues to build toxic, doomed relationships.

All you can do is cut negative people out of your life, it’s hard at first but long term it’s for the best.