Who am I?

So with every guy I have been with I've never really been sexually attracted to them or turned on when we did stuff or made out. I'm 17 years old now and idk what's wrong with me. To be honest the only thing that has ever really turn me on we're.....girls. Well I've never done anything with a girl or had experience with one but like pictures or videos of them I am. Idk if I'm just a teenager who needs time and maybe I'll start liking things with guys or maybe I should be with girls because I wanna try with them but I can never find a girl who isn't straight and my mom just constantly tells me things could change that maybe I haven't found the right guy....idk. Someone help or give me advice. I have felt this way for the last 2 years. Help??