Recently, my best friend started dating my ex. I had moved on already, but I was upset because she didn't ask me if it was okay with me. This is the second time she dated one of my ex's. My ex and my best friend had broken up and my ex was giving me very clear signs that they wanted to get back together as soon as possible, or as soon as we were both ready. My best friend heard word of this and immediately made a move to get back with my ex. Im friends with both of them, but my best friend keeps joining group chats with me and my ex's friend group, despite saying she hated some people in the friend group. She is constantly rubbing it in my face, and I just cant take it anymore. I fucking hate her. I just wanted my ex back and she had to ruin it, make me seem like the bad guy because I liked my ex while my best friend was dating them. I've known my ex for YEARS. My best friend has only known them for a few months, and is acting overly possessive. I hate feeling so fucking jealous.