>>6678963If she actually reaches her goals and gets fit, you basically got her for your life, except if you fuck up really hard (affair) or become the unhealthy shit. Don't make her be better than you, you should have a better job at least, or should be fitter than her, more attractive or whatever. You need to be better than her so she doesn't run away because "you changed".
Remember her occasionally how she looked like once, but in a nice way like "Oh, remember those days at the beginning of our relationship? I remember you with your little chubby tummy. I do miss it a little, because there was more of you because of it!", and add something about how you changed to the better with each others help.