I have absolutely no place in Life Advice. I am horrible at it, and I tend to hate getting involved in people's problems.
Now that I've done that- The fact that you're interested in relationships with females simply means that you're a different type of person. You aren't 'Asexual'. I've known a person who I, multiple friends, and he himself have many times said to be 'asexual', and he was completely uninterested in relationships, let alone sexually interested in any particular gender. However, half a year in our company, and he decided to take the plunge, and have sex with a girl who was a very good and understanding friend of his. Turns out he had a Johnson the size of a baseball bat- Which always attracts women of certain qualities.
Digression aside, humans tend to act in a way that is shaped by both their life experiences, and the actions of their peers. This is why a person who has come out of an extremely bad relationship will be repulsed by relationships. In my experience, a lot of times, it lasts for a small while, or until curiosity revives the cat, but sometimes it can just become habit-forming, like many other things, and cause for them to never really enter a relationship again. Side-note- hence the saying to 'get back on the horse'. Once you fall off a horse, you have to ride it again in a short period of time, lest you become afraid of riding.
In a different case, someone who grew up with no distinction between male and female, will, quite naturally, not distinguish between them. Remember that sex itself is built into our evolution, but the parts of a female body which are 'Attractive', are only so because they've been built into our heads by our society. When a person is home-schooled, and removed from that society, they most likely wouldn't have the same reaction to the same 'bits'. Remember that in many parts of the world, humans still walk around naked or half-naked, and the men aren't always walking around, mouth agape, with gigantic erections.
So- it's completely fine that you don't view women or men sexually attractive. In your group of friends, it could be that you'll eventually come to view whichever gender in whichever way, however, if you're interested in relationships with women selectively, it's a good indication that you're straight- and completely normal.
I lost track about halfway through, so lemme know if I've helped or something.