My gut says to let her go. She deserves to be loved and cherished for who she is, warts and all. She is living a healthy lifestyle but is still overweight due to medical issues. I can see where this really could end up hurting her down the line.....she doing everything under the sun to be healthy, but if she cannot lose the weight, its just not good enough for you.

There is indeed a thing as too much honesty. It saddens me to hear that you hurt her with your comments about her weight. Believe you me, its nothing she hasn't heard before. (Saying this as someone who has had weight issues myself.) But to hear it from someone who is your partner, your closest confidant? That just hurts even more. She is body positive right now, please don't say anything nasty to her about her weight or how you're not attracted to her because of her weight. If the weight is indeed a deal breaker, which I think it is given your comments, please let her go so that she can find someone who will love her....ALL of her, just as she is.

I think that when a red flag comes up and we sit here and ponder if it would be an issue in the future.....then there's an almost certainty that it will indeed be a problem in the future. Well, unless you can REALLY shift your mind frame and way of thinking that is.