I'm going to tell my friend she's bigger than me when she said I ate too much
Are you guys on good terms?
We do act warm towards each other.
Telling your friend they look fat is rude, unless they invite you to comment on their weight. Unsolicited comments like that can hurt feelings, just like she hurt your feelings.
Bullshit. I'm going to do it anyway and see what happens.
Well don't be surprised if she starts crying to gets really angry. What she said wasn't right and instead you can teller how that made you feel. She may apologize.