I'm not even sure which flair to use for this, but perhaps somebody can help me here.
5 years ago, my partner and I got a house together, but only his name is on the mortgage. He paid the down payment and slightly more on the monthly payments, but we kept track of everything, with the express and mutual understanding that I would "own" whatever share of the mortgage I paid into, less interest, taxes, closing fees, repairs, with appreciation, etc.
We are parting amicably now, and the house has significantly increased in value, and he wants to reimburse me my share, but we have a few concerns/questions:
1). He's concerned that perhaps he should have been claiming the "rent" I paid all this

