Confused

I'm so confused if you couldn't already tell that by the title. I'm a 19 year old guy and I don't know if I'm gay straight or bi. Growing up I've always like looking at guys topless. I love looking at a cut guy with rock hard abs and nice arms. It's more of a treat when I get to see them in person. I always find myself looking and staring at other guys, but it isn't on purpose. I don't know if this is because they have features I wish that I had, or I actually just like them. At the same time, I have been totally infatuated by a few girls before. Actually, I'm still infatuated by one girl in particular but when we run into problems, I think I should just try to be with men. I also don't have to many male friends, nor do I have a best friend, and I don't know if I'm looking for male compassion and I'm just suppressing that. I don't know what I'm looking for and I'm too shy to try to find out.