Signs of being a lesbian?

[VoDkA'sGirl]

I know I am not a lesbian, but I feel like I am just convincing myself. Here is why: I hooked up with this guy and I didn't really feel attracted to him. So I didn't feel anything when we made out, and because of that I am convincing myself that I might be gay..I don't picture myself ever dating a girl, and I never look at girls. I am always looking at guys, I get butterflies when I see a guy I like.. so do I sound like a might be a lesbian, or was it because I wasn't attracted to the guy I made out with? I know this a stupid question but it is kind of just to re assure myself.. thanks!