2.Since house is mine, he pay me room rental which is lower than the apartment he used to rent.
3. We share all of the living cost. However, I don't want him share my mortage, interest.... since I want keep my house under my name. If we get married in the future, we will buy another house.
I am a girl with house, which is different from the guy with house. Not sure if it is correct if the guy doing the same thing.