This is something she has to do for herself. It sounds like she half wants it, which is better than not wanting it at all, but the follow-through component is absent. What's present, however, is an obvious dissatisfaction with herself. And, while I'm sure it's unintentional, you're actually aggravating that with your frustration. Now not only is she unhappy with herself, but you're also unhappy with her too. The natural knee-jerk reaction is to close up, and give up, and probably die a little bit inside too. She needs to find her own thing. Not your thing. Her thing. That way it will be her own journey, rather than tagging along on yours. People telling you what to do just isn't motivating. Or fun. What's motivating is owning it, having it be your decision, not being pushed into it, feeling like you're in the drivers' seat in achieving it, and seeing your progress along the way. I think you may have that, but she doesn't and this must be her journey. Helping her with the mechanics of weight loss isn't the way to go. This is a psychological issue. If you want to actually 'help' I'd therefore say focus more on what's going on in her head. Figure out what makes her do stuff. What drives her? Is she a carrot or stick person? Do action movies make her want to take up kickboxing? Take her to an action movie. Does she like dancing to a certain type of music? Get it for her and tell her she has good rhythm. Does she like nature and fresh air? Take her up a mountain. I think you catch my drift. These are all subtle ways that will help her with this frame of mind issue, but not make her feel forced into it. Hope some of that helps.