I'm seeing red flags about how you should be excercising more/maintaining yourself more. He shouldn't be that critical of you. It should be for better or for worse and if he's already telling you how to be, then that's really not cool. he should love you in whatever form you may be in. you two may want to do some pre-marrital counseling to make sure you're both on the same page and make sure there are no doubts for either of you before getting married.