If you are not on the title or deed to the house, you are not an owner: not being an owner, you would not be entitled to any of the equity or proceeds. Paying your share of the expenses does not give you any right to a home, or the proceeds therefore, if you were not on the title; after all, the amounts you paid could have been a gift to your boyfriend, could have been "rent" for living there, could have been paid simply in self-interest, since if you didn't make sure the expenses were paid, you'd be out of a place to live, etc. The simple act of paying expenses does not give any right(s) to the property.