With women there is no on off switch. It's all emotional and an up hill climb. Things like the need to feel apprieciated, public affection, mental connection is needed for women. It's normal for things to become "unpassionate", so you have to find other ways to be satisfied, like role playing, watch a porn together, outdoor sex, fun weekend trips, etc. But it hard to feel sexy when raising kids, washing cloths, cooking, working, shoping and cleaning. We all get caught up in our day to day responsabilities. You may have tried to talk to her on some level about it, but you didn't deal with it 7 years ago. You should have worked on it then and possible counseling for it. So this isn't ALL ON her. It takes two to repair a marriage. It's good that she is making an effort to exercise because that does really help with mental health, and sexual interest. So don't just stand there with your arms folded "waiting" to see if she comes around. You need to be supportive and proactive with her.....work as a team. If you keep this "it's all her problem" attitude, you may as well ask for a separation.