Heheh from an "x" wives perspective who did what your wife is doing:
I could not stand being near my x before we broke up. It was due to his deteriorating mental health and not wanting to help himeself, and then the domestic violence and abuse on his part. The worse part was he thought it was acceptable and justifiable (not saying this is similar to your situation or that this is even happening in your situation).
SOmetimes when you get married it isnt what you thought it would be and you try to cut your partner out of your "real" life and yet not leave entirely but stay so everything looks right. I did that for the last 10 years of 18 years of marriage.
The truth was the less my life became about him, the more agitated and upset he became. In the end the place we shared was just somewher to come home and sleep, shower and change. It is no way to live and is not infact a life at all, for you or her. It sounds like she cant deal with your health problems.
You mentioned ADHD I think and you have gone off your tablets? Hun go back on them and try to see things clearly. It might be that you need to clear and settle your mind so you can think clearly and really look at what is happening. Dont just concentrate on what she is doing to you but look at what you as a couple are doing, what you want out of life and so on. If the relationship is not working...well it takes two to make a relationship both giving and taking, not just one giving and the other taking. Is it possible she is reacting to what is happening to you and your confusion etc?
She may love the attention that you cant give her or something, who knows? Maybe she just doenst want someone to cling to her and try to live out life through her. From what you described it sounds like that is happening. It wont work. Talk to her and try to do everything you can to sort it out before its to late. I can tell you as the one who left, it aint easy even if you are the one that walks out. Life is just so darn hard sometimes at least try to work things out before you make decscions.
Then again if you have tried and she doesnt want to, then at least you know you have done everything in your power to make the relationship work. Lets face it, a erlationship is never going to be easy or perfect and even the best ones take a lot of work. Its when we stop working to make it work that the problems really start. Talk, talk, and then talk till she listens...and listen whilst she talks, I mean really listen, dont just assume you know what she is going to say like most of us do and above all dont yell or shout but just talk!
Dont accuse, dont suspect, it could be true that she does just shrug it all off and whilst is flattered by it may be wishing she got this type of attention from you. I know thats how I was feeling when going through similar things. It was stranger before me but all I saw was my husband and fantasized it was him in my mind. I never did more than dance cause I was faithful till the end and you have no evidence to the contrary that your wife has not been faithful.. We all do lots of things to escape reality, friends and dancing could be her way of coping with a relationship that she doenst seem to be taking part in much.
Sorry I dont mean to offend or cause offense but you did ask.....