Welcome to Susan's Place. I'm sorry I didn't see your post when you came in but I am about half a day earlier than you are. I had these feeling when I turned 13 years old and unfortunately they don't go away with time. Many people can life with them for a long time but they don't get better with time.
Sexual preference - who you are attracted to sexually and Gender identity - how you want your body to appear are two different things. The only thing that is important in determining if you are transgender is Gender identity so it's possible for you to want to be a woman but be attracted to women.
It is best for you to start planning the future by thinking about how you will be able to support yourself and move to a safe location if you feel you need it. It's a difficult problem for somebody your age but getting as much school as you can is a good place to start.
I have two links that you might find useful. The first is
our WIKI where the word transgender will be explained to you. The second is
"the transition channel" where a Gender Therapist will help you explore your feelings.
Continue asking questions as the more you know, the better you will be able to get proper treatment.