Am i gay or is this normal?

Im a male and im 18, all my life i've always been attracted to girls, i've never had the desire to do anything sexual with a guy. I sometimes like to jerkoff in my bed and clean up the *** when im done. This leaves a smell after a day or so and i like it, sometimes it makes me horny, sometimes it reminds me of the comfort of my own bed and makes me relax, and sometimes i dont even notice it. I thought that i just like the smell of sex, when ever im horny i only think about girls. when i went online to research this i couldnt find anything like my situation, i found a article on sexual attraction when it comes to sweat and i read that gay men like the smell of a mans sweat. Somtimes when i sweat in my bed it will smell similar to the sex smell or remind me of a time when my bed smelt bad from sweat and i jerked off anyway and i like that. There are times when the sweat smell smells overwhelming and i dont like it. I did alot of school sports and i work out alot and i've never liked the smell of my clothes after i workout, i think they smell horrible and i really dont like the smell of my teammates or any of my friends that i workout with. i would rather hate the way they smell or not notice at all but i've never been attracted toward the smell of other guys. I only like the sweat smell in my bed am i gay or does the particular smell just Comfort me?