Pretty but the same MO for me too. Dad left before I was born, didn't want anything to do with me, gave complete custody to my mom, didn't think I was his. Grew up with a half sister who had a different dad. Never truly bothered me growing up without a dad, I'd ask my mom sometimes but seeing my mom be independent and happy with just us kids gave me the idea that it didn't matter. Although my friends families, their dads were always nice to me. Kind of like they were father figures to me, even tho they were married.
I'm 23 now and have been ignoring my dad since 18, when he decided to contact me a few days after my birthday. Pissed me off he waited that many years to finally get in touch, after the point of getting CS which I don't even really care if I got the money.