What to do with seeing a person that is triggering?

hi I am currently struggling with disordered eating and I think one of my best friends might be too. I haven't seen her in a while and she looks really sick and skinny. It honestly triggered me and I can just tell she's struggling with an ed because of her body language and arm checking. I didn't want to mention any of her weight loss and ask because it can be uncomfortable for her and for myself but after seeing her it was really triggering and all I can think about now is my weight and ways to be skinnier. any advice to overcome this ?