What the heck?

So I just recently graduated and received my undergraduate degrees. I am currently still living at home because I live in one of the most expensive states (California). I thought my parents were giving me a roof and food while I was in school because they actually wanted to. Last night, my dad said I owe him 20 grand. He's been saying this for a while and I thought it was a joke. Well, I finally asked him why I supposedly owe him 20 grand when he didn't pay for my schooling. He said, "I made sure you had a roof over your head and food so now you owe me 20 grand". I obviously laughed and said I owe you nothing. I never asked for them to have me at home, I wanted to dorm but they insisted I stay home. Now I think I know why. I'm so tired of feeling not truly wanted. I'm already severely depressed and anxious as it is (which they haven't even bothered to notice). Sorry I had to let this out, but am I wrong? Do I really owe him 20 grand?