there probably are different reason for her feeling the way she feels but if you are in a marriage or about to get married you just dont shut down like that. it takes so much more and i really dont want to put things into your head but the fastest thing to cause a shut down is someone else coming into the picture. in all honesty try to take yourself out the circle and look into it. man you can't afford something you cant afford it.what are you supposed to do buy the house knowing that you can't afford it. that in itself just isnt right. i know you are hurting but know one thing that so many things happen for a reason and i dont know your situation like you know your situation but like i said take yourself out the circle and start looking in as if you were the 3rd person. things will become so much more clearer and the best thing just might be happening to you and pray that also helps. one thing to always remember is that what dont break you can only make you stronger