AIO my friend thinks im fat

i just posted a seperate AIO about her a few minutes ago, and remembered this and feel like its very fitting. so i, 18f, has a best friend, 17f, and the other day she randomly says to me “dude my mom thinks youre skinny” in like an impossibly shocked voice. and i just went “oh?” and she says “yeah, she said we shouldnt go to ____ because well get snatched up, so i told her were too fat to get snatched up. then she tells me, ‘uhh well (my name) is pretty skinny..”” for reference im 5’3 and 173. at my heaviest i was 215, but i lost all of that weight. all throughout our friendship shes felt so comfortable commenting on my weight and ive asked her on multiple occasions to please stop because it makes me feel horrible about myself. shell stop for a while and eventually theyll start back up again. shes heavier, id guess around the 240 mark. shes 5’2, and let me say this, theres absolutely nothing wrong with her being bigger ! and ive never in our entire 5 years of friendship, commented on her weight. but ever since ive known her, ive always been the smaller one out of the two of us. NEVER small by any means, probably 168 at my lowest while knowing her, and it was when we first met. im just tired of feeling worse about myself when we hang out:/ and every time shes talking badly about herself she has to include me into it. “WE are so fat” is one i hear a lot. it just hurts. aio?