I still feel stupid for remaining friends with her a while

Long story short, she was turned out to be very stupid and cold. She didn’t care at all. I think she was a sociopath or just someone with no empathy. She was so unhinged what she said or done. She became distant when her bf moved into town and brought him EVERYWHERE. He didn’t seem interested to talking to me and even straight-up rude to me.

I decided stopped being friends with her after her ghosting me or indifferent response when something very bad happened to me, to several months later acting like we still friends for her baby shower. She stopped reaching out after I blocked her on IG, and wanted to see if she would message or call. She didn’t lol