Should I Care?

I am a only child and daughter of two lesbian mothers, although me and my biological mum move away when I was about 6. Both my parents were very open to me from a young age about how I was born, although I never really questioned it until I moved to a more conservative area, where every kid had a mommy and a daddy and lots of my friends found it strange when I told them I didn’t have a dad. When I was really little I spread a story about how he was brutally murdered in a forest, which obviously sounded stupid as we all grew up. As I moved up into middle school and high school my friends seemed so..sympathetic that I didn’t have a dad! They would say things like “Oh! I’m so sorry..” and, “That must be so hard.” As a teenager I was now questioning my history, the way I was brought up. When I was younger I always didn’t care, who needed a dad?? I never knew him..don’t want to know him! But now I feel like I should care, and I really wish I don’t! I’m not about to go hunt him down or anything, because at the end of the day he isn’t really my dad, just my biological father. But I do however wonder if maybe I missed out on something.