I'm not willing to help a girl in class after being rejected
Why are not willing to help her?
I want to laugh at her instead.
You don't have to help everybody, but it's petty to resent someone who rejected you. You're just proving she was right to reject you.
Hey its fine I'm not laughing at her. Just like she never thought of being nice to me.
Holding a grudge over something like this lets people know that you are petty. If you're willing to help her out she might be grateful and give you a chance? Wouldn't that be better than just being upset?