I really, really, really don't like you.

You've never been nor will you ever be my father. No matter how many times you try to be nice to me, no matter how many gifts you buy me, no matter what you say or do now, I will never consider you my parent. You were the one who ignored me through my childhood. You were the one who refused to do anything with me or even speak to me. You were the one who treated me like I wasn't your child. Now you want me to treat you like my parent? No, it doesn't work like that. In my eyes, I have only one true parent. She's the only one who's always been there for me, even if we haven't gotten along the entire time. Out of the four parental figures I have had thrust upon me, how is it that only one of them actually acts like it? I love the other two, regardless of what I think of them as parents. But you, you useless arrogant prick, I'll never love you. You're just the guy that happened to marry my mom. That doesn't make you my father. That doesn't make you my parent, or even my caregiver. That just makes you an obligatory roommate.  So the next time you wonder why I treat you the way I do, think about how you treated me while I was growing up. That'll answer your question.