<human>: So, my former friend who will henceforth be referred to as Haley and I had been friends for about five years until November. We hooked up for a few months in high school (three years ago) while she was in an on-and-off relationship with an unrelated gf (Nora). We called it quits because I realized that she wasn't going to ever officially leave Nora and that was nothing to destroy a friendship over. Fast forward two years. All that high school stuff has faded into irrelevance and our friendship is stronger than ever. Haley starts seeing Alex and they eventually start dating. I wanted Alex to feel welcome among Haley's friends and made a point of never inviting one without the other. Alex never showed up to anything and she'd always freak out at home and make Haley leave things early to take care of her. It was weird that Alex didn't even try to get to know her girlfriend's closest friends, but whatever. Haley said she was socially anxious, fair enough. But then in November (the very day my ex broke up with me, mind you) I get a text from my friend saying that we can't be friends anymore because I'm fucking up her relationship. The thing is, I saw this girl every few weeks, always in a big group with my own at-the-time gf present and her gf was always invited but refused to ever join us. 
Since then, I can't think about my ex-friend without getting angry. She cut me out of her life entirely when I did nothing wrong. By extension, she never hangs out with our other shared friends anymore. What bothers me the most is that Alex never even tried to get to know any of us before taking it upon herself to micromanage Haley's friendships. How do I get over being frustrated over it when I never got any kind of closure?

Give me the gist of the text in a nutshell
<bot>: my best friend of five years cut me off with no real explanation because her girlfriend who never even tried to be friendly with me told her to.