Is it normal i hate my ex-friend with all my heart?

So, to start off, hi. My ex-friend and I started being friends two years ago, we were both bullied and quite shy and were kind of the outcasts, so we bonded. Turns out we were great friends, for that year. She had certain scandals and sent nudes to this guy she was 'dating' who claimed to be 18 and was actually probably in his fifties. So this girl despite making some bad decisions isn't bad, right? Wrong, I think. She claimed her mother was abusing her to me and she always fed me depressing info about her family at home. Turns out she's a disrespectful girl to her mother and mutters about how much of a bitch she is even when her mum just wants her to make her bed. Also she wasn't even abusing her, she was just smacking her occasionally (never hard enough to go red, or bleed, nothing too bad) And I know any abuse is wrong, my sisters and my brother have been abused by my dad for years till he stopped, and my family life isn't perfect either like hers so I know its hard but she always claimed how perfect my life at home was which wasn't true, no one is perfect at home and she literally had no right to say that. Also she told me all the time about how she cut herself when she only did it for attention, she doesn't have a bad life, she's always giggling and never appears depressed, although she could be faking it and actually sad inside, there's a very slim chance seeing as everything in her life is great, she started after the bullying stopped too. Also she became good friends with the person who was bullying me (they bullied her a bit but not so much) I eventually confronted her because they were saying mean things to me but she just told me 'he isn't that bad!' We are supposed to be best friends, I don't see why she has to act like that. Anyhow, after I started disliking her she moved schools and didn't talk to me for a whole year. Oops. After the year she called me and asked me to come to her birthday party, which I did, despite disliking her and the fact that it was the same day as mine, and she forgot till I told her, I just felt pressured so I said yes. On the day of the birthday she greeted me, there was about 7 other friends there, one of which that I knew, other then the greeting she ignored me, and hell everyone except for two of her friends, for the whole day, the other 5 of us were a bit annoyed because we all felt like fourth wheels to my friend and her two new friends, when it was time for cake everyone was quite quiet and she said "Why is everyone looking so depressed?" and laughed about it with her two friends while the rest of us just shuffled in our seats, all knowing the answer but none of us brave enough to say in front of her and the adults. I haven't spoken to her since and i'm pleased, next time she asks me i'll just say no and if she asks why I will just rant at her, but is it normal for me to hate her will all my heart because of these reasons??