I'm upset with my so for inviting his friend out with us
Is there something wrong with your significant other's friend?
I hate her because she's a typical bitch
She might be a bitch to you but she is still your partner's friend which you should respect for the sake of your partner. Otherwise, it seems a been controlling and selfish of you to judge who your partner can be friends with and your partner might not like that.
Some bitch called me a whore.
You might not get along, but it will seem selfish if you don't want your partner to hang out with their friends. You could bring up to him your reasons for not liking her, but do so in a calm way so he doesn't get upset.