Find guys attractive but still be straight?

i'm 19. i like girls. i have a physical and emotional attraction to them. i want to fuck girls, i want to date them, i want to marry one, and everything else that is related to girls (relationship-wise). on the other hand, i do find guys attractive (my reasoning? hot guys WANT people to think they're hot.) but i would never fuck one, date one, or anything like that. in some situations, gay topics even makes me uncomfortable (sometimes). but when i'm curious and watch gay porn, i get turned on. basically, i'm not attracted to men but i DO find attractive men attractive. (part of that reason is because i envy them and want to look like them). i've never thought of a guy and said "i'd totally date/fuck him", but gay porn does turn me on, but the mere thought of me ever fucking a guy makes me uncomfortable, i could never do it. but then again it's also because i envy their masculine physique (if i'd look like that i'd turn myself on haha). lastly, one of my guy friends laid on top of me and groped me (as a joke) and i got a little hard. i was VERY uncomfortable at the time and i don't know why i got semi-hard. in the end, gay porn wouldn't turn me on if they were two hairy men groping each other (eugh.) but when two attractive masculine males go at it, i get turned on, so it's probably related to their physique, not so much the actual gay aspect of it. SO: AM I BI? or just a little adventurous? or just confused?