Am I mentally abusing people?
Why do you think that you are mentally abusing people?
I don't really try to, it just happens.
It seems like you don't mean to, but if you are mentally abusing people, that's bad. You need to stop, or see a therapist, before you cause someone real mental harm.
Sometimes I don't know that I'm hurting people.
It sounds like you know you might be saying hurtful things to people but you don't realize you're saying it until after the fact. Take a moment to think about what you're saying before you say it and it may help you control bad comments.