<human>: Can you condense the text into a few key points?

I [20M] have been dating this girl for a couple years now and when we started out she was probably 5'4" 120 pounds and looked amazing. She is just about to complete her freshman year of college and instead of putting on a freshman 15 she put on a freshman 35 and isn't showing signs of slowing down. Having access to dining hall has brought up some self control issues with her. She eats desert before and after dinner and she doesn't make any use of the gym 100 yards away. The weight is really starting to impact my physical attraction to her and it makes it harder for me to throw her around the bedroom now that we're about the same weight. 

Another problem is that it's taking a huge toll on her confidence and self esteem. She gets jealous when I'm around girls that are in better shape, which she never used to do before. She also lashes out at me since I've been working out and eating healthy and calls me manorexic (I'm 5'8" 155-160 lbs) 

The biggest problem is that she has a history with anorexia so there's no good way to approach the subject. She's been healed for 5 years now so I feel like anything I say could trigger a relapse and that's the last thing I want. Is there a gentle way to try to get her to lose weight and improve our relationship?
<bot>: my previously anorexic gf gained 35 pounds this year and I don't know how to approach her about it.