I know this may sound like seedy advise but you could try buying female pornography and see if it turns you on. I am guessing you are in high school but if you go off to college there are gay/bisexual advacacy groups you could look into. I am not saying to go have sexual encounters with a million people, but you could try experimenting with a girl you are attracted to and trust. Then you will know for sure. If this advise is too much for you, you can disregard it. It is ridiculous the stigma attached to homosexuality. It doesn't hurt anyone so I don't know why some people have such a problem with it. Good luck.