If nothing else, you have an opportunity here. You can get yourself into a much better place under cover of darkness, so to speak. There is no question that she's not going to be attracted to the guy that was here this morning, so don't let him out! Get to work on you, and do it now! (Easy for me to say, but there you go...) When you see here, put your best foot forward, but keep it quick until you are stronger. Build up your confidence little by little, eat right, exercise, read something you always wanted to but never got around to. Rededicate yourself to that hobby that has fallen by the wayside (I've got a couple, I bet you do to). You'll get better at it, and what happens, self esteem rises. Then just be confident. As time goes on, she'll see it, even in small doses. I'm not saying that being physically separated is a good thing, but at least you can have a better chance of controlling how you handle your encounters when they are 'scheduled'. My wife lives in the same house (though I'd say that for practical purposes we are separated), and if I'm off a bit, she sees it. It makes it hard to work through things when you are always 'on stage'.
I guess my point is if you've got lemons, make lemonade!