Jealousy

I’m finding myself more and more jealous my fuck buddy moved on. Long story short we met on a dating app, dated for a couple months but he kept saying I was too good for him🤦🏼‍♀️. I suggested we just be fuck buddies obviously he agreed. We literally were having sex until the day before him and this new girl started dating. Now that they’re together we’ve decided to be friends we still care about each other but I seriously want her out. He tells me what she does and how she treats him and how controlling she is and how he hates it and how we should be together. I’m driving myself crazy everyday thinking about it!