Well, unfortunately, how you see it is incorrect. You comingled it into joint assets - every penny of it is now a marital asset subject to split. As far as taking his name off the condo and claiming it as your own, that is something you two will have to discuss in mediation - he has the right to want to sell it and split the equity...and it he does let you keep it, you will have to buy him out of his share of the equity.
On top of that - if you have children together, he can keep you in WA....as you are going to have to wait to file until you are established as a resident - because you no longer live in TX and and you also can't file in AZ because that isn't your "residence" either.
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