If you like the same sex and are not attracted to the oppisite sex at all, then you're gay. I mean, I am gay, and I can tell a ugly woman from a pretty woman, but I'm not turned on by them. I think men are built better. It is most likely from what you have told us that you are not gay. Could you give us a bit more info?
Is this your first sexual expirience?
Was there passion?
Did you like it more than straight sex? (If you had have heterosexual sex before)
Do you think you're gay?
Have you found boys to be more "intresting" than girls?