I said something I shouldn't have
What did you say that was innappropriate?
I called my friend fat for overeating
You should think before you say things. apologize to your friend and tell them you didn't mean it.
My friend already forgave me, I don't care what the fucks going on.
It's important to be careful with the hurtful things you say, not everyone is forgiving of hurtful words. Saying you don't care will lead to you thinking and acting that way. So try not to use those negative words.