What is wrong with me!?

Ok, here's the story I am 15 (Male) and I have been single my whole life. I am now scared cause I actually like gay porn than the straight one though I also like straight. I want to be straight but I have researched that there is no answer to this unless being bisexual. I know this is a bit too much, but people often imitate me as "gay" due to my actions but then I don't want to be like that so I ignored. I even study how to stop this attitude. So, I told them that I am 100% straight. I want to have many men friends too (no romance) because being with girls may worsen my gay attitude. When I was just in elementary, I do act a little bit girlie because I am more comfortable with girls and the sole reason I'm closer with my sister and mother. On that, my teacher told me that I am a mermaid I don't know why and that's why my classmates kept on teasing me so badly until such time I really did become gay silently through watching same sex porn. I haven't tell anyone about this matter because I am scared. My family doesn't want gay and I too myself. I don't even know why I am like this. Most of all I don't want to make them upset. I really want to have a girlfriend in my life but they rejected me because I am no good. I sometimes even hate myself because no matter what I do I can't act socially good. I am silent and I think people think of me uninteresting. I don't know anything what to say that's why I think I am no good. Since then, If I become older I am really scared what could happen to me. I want to have a family, a wife and have kids. I think I doubt that could happen because of this mind wanting me to become gay. This is my deepest secret in my entire life so you people are the only ones who could help me with this. This keeps haunting my life so badly! I Owe you if anyone could answer this faithfully and truthfully. Just by answering this question makes me happy and feel that I still have hopes. I'll be waiting for replies thank you.