Questioning my sexuality?

[bigl]

Recently I've been wondering if I'm gay. Like for some reason I'm just wondering if i'm attracted to guys and I look at them to check them out to see if im interested or turned on but I'm not at all its just like eww to me when I think about it. I don't have a problem with gays but I honestly do not want to be gay like if I am. Like it scares the shit outta me just sitting here thinking about it. When I don't think about it I notice myself still checking out girls and stuff. I'm still in high school im a senior I'm 17 years old. Today was halloween and some girl was wearing leather and I kept staring at her backside i'll say and then there was a guy wearing short shorts like the dude from reno and I looked at him a few times to see if i was interested but nothing. If i'm so uninterested and unattracted to guys(as far as I know) then why do I keep questioning if I'm gay or not? Its like this girl I know, I think i have a small penis, I'm roughly 6.5 inches long and about 5 inches around and she tells me I have this thing something like a mirror effect where I think i'm small but in acctuality i'm not is that the same thing for the homosexual stuff would you think? or am I really gay? and if its the real thing how the fuck.... fudge do i stop it? Like I'm not comfortable with being gay ill joke like I am and stuff but i'm not actually down for it and like not at all, I would never find peace with it i know this. I would rather spend the rest of my life either 1) alone 2) pretending to be straight or 3) commit suicide