I think my friend is really vengeful for some reason
Why do you think he is vengeful?
He is always so mean to people he parties with.
If he is always mean to people at parties then he probably is vengeful. Instead of being vengeful he should treat people with respect.
Nah my friend is just a bad influence anyways.
If you recognize that, maybe it's time to stop being friends with him. It's not wrong to remove toxic people from your life for your own good.