please help!

how do i know if i’m bisexual or not? i’m almost 18 and i’ve liked guys all my life. i even had a 2 year boyfriend recently.

but growing up i remember i was obsessed w selena Gomez’s boobs and cleavage in certain movies/shows and as a teen i’ve always loved lesbian porn more than regular.

my best friend is bisexual and we have become super close. i’m starting to really love her as a person and we have even kissed before like jokingly but one time she said “it’s kinda weird i like kissing you” and i agreed but that’s the only time we’ve talked about it. i’m still so obsessed w guys and so is she like that’s all we talk about is other guys. ANYWAYS i can’t tell if i like her more than a friend or not because i’ve never had an issue like this. any advice? also.. considering my story, do i sound bisexual?