I noticed she couldn't afford any new clothes so I made fun of her
How cruel can you be? Why is it necessary to make fun of someone who can't afford new clothes?
I'm fine with making fun of others since that's how I would want to be treated.
It's wrong to make fun of other people. Just because you think thats how you want to be treated, doesn't make it true for others. You're just upsetting them and making them feel bad for something outside of their control.
I'm making fun of others because it makes me feel good. Imma do me and the haters can hate.
Do you think you'd truly be happy when everyone has a negative opinion about you? Making fun of others is not healthy, and it can really dampen your relationships. Why not try reversing this attitude and see how great healthy relationships could be?