My girlfriend potentially has an ed

So my girlfriend started gaining weight in the pandemic and has had difficulties keeping it off. Particularly during stressful events such as exams because during these periods we typically have a sedentary lifestyle due to continuous studying and because of stress, she tends to order in calorie heavy foods.

She has a relatively active schedule now with dance classes and working out in her free time but it takes time for the weight to come off and since she still has her comfort carb foods it’s going to take even longer.

She usually rants to me and cries about her weight and how she pukes up her food if she has had a lot and doesn’t want it to sit as fat in her body and it affects me negatively.

I have and still do have weight issues. I have always been fat. Only recently due to an illness i lost weight. But to maintain this weight I have starved myself and brought back my unhealthy relationship with food and listening to my girlfriend talk about hers gets to me sometimes.

She’s never willing to accept help about this topic from either me or professionals because of course her parents have been critiquing her for so long that anything similar from anyone else probably sounds similar to her parents’ harsh words.

She has been dismissive about my weight issues in the past and I had brought it up with her and she said she won’t do it anymore but I still don’t feel comfortable talking to her about my own weight issues because I might end up triggering hers. She thinks that people who are “thinner” than her shouldn’t talk about how much weight they’ve gained and stuff.

I don’t want to negatively get affected by this anymore but I want to stay by her side and help her through her bad days without it getting to me much. I don’t know how to help her and it doesn’t look like she wants help anyways but I’m really lost and confused on how to deal with this.