I just wanted to drop you a line to let you know that you're not the only one going through this. My sitch is a little different: We're a little older and been married just a little longer, but I can definitely relate to your W just giving up and refusing to communicate. I wish I could tell you it gets better, but in my case, it hasn't. I hope your sitch ends up better.
You need to GAL and keep a PMA. You seem to believe you have a good idea what her complaints were. That's good. I urge you to take a good, hard look at yourself and see if there was anything else that you haven't admitted to yourself yet. These complaints will help you find your 180s.
Again, I can emphasize so much with your concerns. How can you effectively do 180s when your W doesn't want to see you or communicate with you? If your W's complaint was lack of affection, how can you do 180 with that when she doesn't want to talk to, much less be touched by you?
I can only tell you that you're doing this for you now. Read the DB/DR books if you haven't yet. Read Sandi2's rules sticked at the top of this forum. Print 'em out, keep 'em with you, keep them posted at home if your W is not there. Live them. Trust the process. Remember: PMA. GAL.
If you want, check out my posts. There's some good advice from some vets in there. I wish I could say I've had a happy ending, but... Anyway, I could use the well wishes. I'll be sure to check in with you. I wish you the best.