"she either has to realise that what she's throwing away is priceless, or I have to find someone who actually values my self worth"
I would just comment that your self worth is really determined by you Huddy. And what your W (or some future lucky lady) feel about you is up to them. How you feel about yourself (and your inherent worth) is what really matters here. And for all of us, it's so important to get ourselves to a place of self-acceptance and acceptance of our situation before we think about moving forward with a new relationship.
I think the advice above is spot on - an ultimatum just makes you look tied to the situation. And it's useful to ask yourself why you would want to do that at this point. The way I see it, she will or she won't - and we none of us know. So we all might as well live our lives as though 'she/he won't' and if 'they do' well there's nothing lost...because you have grown, learned, extended your comfort zone and lived life well in the meantime...
So I think the important question is not - what should I do in respect of her - it's what am I doing in respect of me?
Sorry to hear about the flat and hope you find a lovely new place soon.
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus