My H never left either, and I can tellya, that he (and I suspect men in general), so do not like to confront emotional issues. My response to my H's emotional AWOL, and wanting to leave, not being "in love with me", having EA, was to work on myself, making positive changes, and GAL. Of course, I fell off the wagon many times, but always picked myself up, dusted myself off, and carried on. Time will tell where this gets me, but, for now, he says he is committed, and has always loved me (was living in a fantasy). I also thought, at one time, that he was only staying for the sake of the kids. Still, lots of work to be done.
I can only relate to your sitch, while trying to find commonalities with mine, so my advice (for what it's worth) in your situation is to find ways to improve (maybe 'improve' is the wrong word, perhaps 'optimise' is a better one) yourself, find ways to be more interesting, don't make it about him, but about yourself. You have made a start by overcoming the depression, so continue working from that. It could be little changes, like changing your hairstyle, getting into the gym, finding a new and interesting hobby, or whatever fulfills your interests. Take little steps. Ultimately, I went back to school, and am studying toward a fitness trainer certificate. Quite a challenge at my age, with my weight issues, but so far, doing well, and am fit and a lot healthier, and am losing the weight (40lbs to go). My H is quite impressed with me for doing it.
Good luck!
Me:57 H:52 M:28 Got another lawyer last year and filed. D35,S/D twins28,D22 EA4/04 End? Who knows? "Life is like a mirror. Smile at it and it smiles back at you." — Peace Pilgrim