I own a house, I pay the mortgage but the mortgage is in my ex-husbands name therefore the 1098 is in his name, how do I file this 1098 if it's in his name?"

I pay the mortgage on my house, the mortgage is in my ex-husbands name because my house was almost foreclosed, we did a modification but because of my income I wasn't able to get my own mortgage, therefore until I'm able to get a mortgage under my name the mortgage stays under his name as the borrower, which means the 1098 form is under his name, how do I file this form if it's under his social security...he does not contribute anything towards the house, I do it all!