What should I do about it?

My dad is a fire chief, but I think that the istant chief and EMS director is my real dad. (My mom is dead, otherwise I'd be asking her) But he's the one who always picked me up from school when I was sick and he's the one that took me driving with my permit and the one that I went crying to when my first boyfriend broke my heart. He's the one that I always wanted when I was sick or scared when I was little and the one that once sat up with me in the hospital all night while my "dad" went home to sleep. He's the one that I talked to the first time I had and the one that went and bought me two pregnancy tests when I was freaking out about it. He's the one I called when all of my friends were drunk and I knew I needed a ride. My "dad" got all emotionally detached when my mom died, and he doesn't care about me anymore, so I talk to Brad. As I've been growing up, some of the guys at the station have been saying that I'm starting to look more and more like Brad...........and I can see the resemblance now, too. And we're both ADHD and we think and act exactly alike......so what do I do now??????