I don't want to be friends with the differently abled kid in my class.
Why don't you want to be friends with him?
He has a mental problem so he becomes uncontrollable sometimes.
I understand that it will take you a lot of efforts to get along with your friend that has mental issues. It'd nice if you put yourself in his shoes and think. He'll be so happy if you befriend him.
I'm not going to do that.
What if you were differently abled person and someone avoided you just like you did, how would you feel ? I guess it's not a nice feeling. Nicety always pays off,