AITA For telling my parents to pay me back my college tuition if they want a relationship

I was raised by parents who believed (religiously and just culturally) in rigid gender roles. Dad should work, mom should stay home with the kids. It was an unspoken rule that all my sisters would go to college, but that wasn’t necessary for me because I was a boy. It was also an unspoken rule that my sisters would change their last name when they married, while I would keep our family last name alive. It was also an unspoken rule that they would pay for my sisters’ college, but I had to figure that out myself. It was also an unspoken rule that when grandpa died, most of his money would go to me, but the sisters would get most of his property (two small commercial buildings, a rental house, and his house that my parents live in).<br><br>I don’t have the most relationship with my parents, but I saw them at my sister’s wedding. My grandfather died about a year ago, so my folks are flush with cash. We started talking about my college and my loans. My dad insisted that it’s not that big of a deal, I got a good education, I make good money now, I should be grateful. I told him I wasn’t looking for a handout, but they should pay me back my tuition money. He said I should be happy they gave me a home until I was 18. I reminded him my sisters got a home until they were 22, plus they got their college paid for.<br><br>He said I was being immature and ungrateful. I said they wanted a son, they got one, they should deal with it. I said they created this person, so they can either pay me back my college tuition or they can accept that they won’t see me until the next wedding or funeral. He got mad and said he’d never pay me back. I walked away.<br><br>Now my family is blaming me for being petty. I don’t see it, but it’s not like my family is unbiased. AITA here?