I'm going to call my friend fat
Is your friend fat?
My friend is fat and there's no way I can ignore that, she's in denial and refuses to admit it.
Not everyone is able to control their weight easily so you shouldn't make fun of someone for it. Have you thought about trying to be less judgmental?
I'm right. There's no way she can stay like that and not be fat.
If you want your friend to loose weight. Be supportive and ask her to walk with you. Do things together that burns calories.