When people who hurt me suffer, it makes me feel so happy.
Why would that make you feel happy?
I'm the kind of person who likes to bring people down.
Wanting to see people get what they deserved for wronging you is fine but enjoying when they suffer is a bit much. You shouldn't want people to suffer unless of course you're okay with people feeling that way about you. If you can't seem to stop feeling that way you should probably talk to someone about it.
Nah, I'm going to talk to multiple people until they understand me. I really enjoy hurting people.
You don't like hurting people, you just like the idea of karma making up for people who have hurt you. It's alright to feel that way, because justice always gives us all a sense of happiness-- but you shouldn't take such delight in other's pain because people will think you're weird.