Matt, I think you know the answer to your question. While watching gay porn is not necessarily an indication that you are gay, the rest of your description certainly points in that direction. Don't worry so much about it. Gay guys of your generation will achieve truly equal rights. You will be able to do all of the things that straight guys get to do. You can have kids, a family, a marriage, a successful career, etc. Just relax. If I'm wrong, you'll be fine, too. It really doesn't matter unless you let it matter. Sexual orientation is a small part of who you will be as a man, although it will matter in those areas that are probably most important to a 15 year old--great sex once you are an adult.