I'm not going to stop eating junk food around my friends even though they're dieting.
Don't you think that's teasing them?
I'll eat whatever I want in my life. Eat what you want in your life.
I get that you want to eat whatever you want, but maybe your friend is struggling because they see you eating all that unhealthy stuff. I think that you should try to be a little more supportive of your friend's health goals.
I don't care that much.
I can tell you don't care, I'm just asking you to be considerate.