Ok, so... When I read the title of the thread I was shocked like 'Happilyforever', but having read the post here's what I think.
It's been a 7 month relationship. I believe that you 'love' this girl, but most people do 'love' each other at the 7 month mark. Especially when they only see each other so seldom. From what I've read, I don't believe that you TRULY love her (love is, somewhat, blind) and I don't believe that she truly loves you (she can't commit to the diet, something that would make you happy). This part is complicated though because she probably has an issue with the fact that you have mentioned it. Subconscious or conscious, she will stay chubby because she wants to know that you're loving her regardless of weight. Its self-sabotage but its reality for so many relationships, be it weight; clothing; a beard etc.
You would need to sit down as a couple and differentiate between the fact that
1. You love HER, regardless of her weight and
2. The fact that her losing the weight would make you happy, NOT love her any more or less. THOUGH The act of her compromising her lifestyle for you and losing weight, thats love. Being thin is not.
But i think thats a bit far gone. If you're having doubts at this stage, I think you should bow out gracefully. You'd be doing both of you a favor.
It's wrong for you to break up with her solely because of her weight, but its way worse to stay in a relationship with her when you don't want the relationship for this very reason.
Just my 2 cents, good luck dude!
