From what you say I am assuming you may be Asexual, Demisexual or Pansexual.
Asexual being that you truly have no sexual attraction to either male/female
Demi being that you need a strong emotional bond before attraction
Pan being that you may not care for their genitalia nor their gender-identity and may end up liking them for who they are
By the way everything I'm saying here is by my own logic and understanding of sexuality, I do not have formal training in psych/sexuality aside from what I've done for my major in college.
In any case you may be one of the above or something else, you'd have to do more research on these however.
That aside, it is possible that you have a narcissistic attraction to yourself. As I understand it, regardless of sexuality it is entirely normal to do something like looking at yourself in the mirror while masturbating. Of course you know yourself best you know how to please yourself and you probably really like how you look physically. Nothing wrong with that.
I suppose its really a pretty complicated thing. It could be that because you haven't known anyone else your best choice is you and therefore you turn yourself on. If you end up dating someone and after getting close you prefer to fantasize them instead of yourself then your current issue is just from lack of experience.
Then on the other side of it even if you do date someone what will matter is your perspective on it... That is, did you get with that person because they happen to look very similar to you and that was the majority of the reason you're together? Whether yes or no the other part is that even if you did get close with someone else if you still prefer to exceedingly turn to fantasies of yourself versus your partner then it is most likely that you're narcissistic.
I think I understand what are you talking about and wow, it does clear up alot of stuff up. Based on what you said, I think its highly probable that the lack of experience is the case. In the past, I've been attracted to others before regardless of gender, though then I leaned more toward the guys XD.
Its also a matter of experimenting with things, dating etc, that will help to find myself sexually but living in a part of the world where exploring ones sexuality is difficult and looked down upon does make it tough. But, I appreciate your thoughts on my current predicament
and as of now, I kinda see a tie to demisexuality.