How do you tell if you are bisexual or a gay person who was conditioned to like heterosexual relations?

I was conditioned to want heterosexual relationships not because I wanted to but because I was supposed to. I tried to get at attractive girls not because I liked them (I didn't find their faces attractive at all) , but because that was what I'm supposed to like. I check out attractive girls not because I'm attracted but because it's what I'm supposed to like. After a while I started to enjoy it and it gave me confidence that most attractive girls liked me. I don't really feel any desire for them though.The thought of having heterosexual relationships & marriages feels mostly unnatural and forced but slightly enjoyable while the thought of having homosexual relationships & marriages feels natural & right. When I try to look at it from a different view as if I had no biases and made my own judgement from my feelings about wanting guys or girls, I'd probably think I was gay. It seems like if being gay was okay my whole life I'm not sure I would even think of having a wife.I'm realizing that I fantasize about homosexual relationships and marriages , but when I think about heterosexual ones I feel uncomfortable but slightly okay with it. I feel the reason I think about heterosexual relationships is because i was supposed to.I don't know if I'm bisexual or gay who was conditioned to like girls.I think that I'm gay most of the time but once or twice a year I see a girl with a build I'm attracted to and I think I can't be gay because I just found her build attractive. I've been attracted to about 10-15 girl's faces in the 27 years I've been alive. I've only seen 5 girl's faces I've found attractive in the past 9 years. I cant find a girl's face I find attractive on the internet. I can easily google my taste in guys and find 90% of their faces attractive. I've found guys attractive that weren't in my typical type on the internet too. The kind of girls I'm attracted to personality wise are basically girls with straight guy personalities that have straight guy interests and wear straight guy clothes.I still remember when I first saw porn magazines with my friends when I was 12, they were excited seeing naked hot girls and I felt indifference towards it and I thought vaginas looked weird and gross , I was confused why I was supposed to like vaginas. When my straight guy friends saw a penis in one of the girls mouths they all were disgusted by the penis, I was attracted to the penis but kept it a secret.When I started watching internet porn I thought I was straight so I watched straight porn but wasn't really into it, I just tried to masturbate to it anyway. Eventually I started finding these scenes, girl's bodies, and straight porn categories attractive. When I see "hot" movie scenes of girls stripping or dancing I feel indifference or I got bored and wanted to skip it except for one movie scene. My straight friends were telling me why are you skipping that it's the best part. When I saw the trailer for Magic Mike I was turned on and into the male dancing.There's more but from this I don't know if this makes me bisexual or gay who was conditioned to like girls.