I'm thinking about abuse and my relationship with my girlfriend.
Were you being mean to your girlfriend?
No, she gets angry at me and I don't like it.
Depends on how she's being angry with you. If it's OK if she has legitimate issues with your behavior, but if it's destructive and undirected, that's not acceptable.
She's so angry with me all the time.
This relationship sounds toxic to me. You might need to consider breaking things off with her.