Any suggestions of how I can get her open to the possibility of us sorting things out?
That's the problem; you CAN'T get her open to anything. Basically, you can't make her do anything. She's in independent mode and will resent any of your attempts to control the situation. You can only hope that she at some point becomes open to the possibility of sorting things out. That doesn't mean you can't indirectly influence her. You can show her someone that she'd be crazy to leave.
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I do all the housework at the moment, she has done none
This is fairly classic. The guy suddenly switches gear and becomes Mr. Do everything. I personally think it's a little overboard. It comes across as too much in her face. And, just like her, you shouldn't have to do everything. You can continue to do things around the house, but I'd slack off of it a bit. Find some activities outside the house. Did you say whether you have kids? If you do, then spend quality time with them. If you don't, then pick a couple days a week where you get out of the hostile environment of the house. You need to recharge your batteries if you want to be in this for any length of time. Rediscover old friendships and interests. If you don't have friends, find some group to belong to or do some stuff for yourself. It's okay to tell her that you are going to something, and casually ask, "wanna come?", but go anyway if she isn't interested. Don't let her wear you down with her anger.
In the end, it's not the years in your life that count. It's the life in your years. Abraham Lincoln
It is hard to fail, but it is worse never to have tried to succeed. Theodore Roosevelt