My boyfreind and I have been living together for 6 years and his only contribution is a bit of groceries and the electricity bill every month - we are both divorced. I feel that as we are living in my house and I pay a huge bond he should at least contribute by means of a monthly "rental" - he pays his ex wife maitenance and has one child of 17. He says he cannot afford to pay me rent and I am feeling very resentful - am I being petty?