My best friend made a move on me! Help!

[shadetree]

So my best friend of five years and I decide to have a threesome with a girl - strictly guy/girl stuff - my best friend and are are both straight. Or so I thought. He shows up at my place with this girl named Carol and everything is going fine. I know her from school and she's a pretty easy girl, so I had no doubts about the 3way. Everything was fine, until about 1/2 hour in to the 3way. We were all drunk and a little high and it was getting pretty hot, I was going down on Carol, and my friend was getting his dick sucked... until I feel someone sucking my dick, and I see the girl is positioned the wrong way to be doing it. Now I'm face down in her lap but I jump up and punch my friend in the face.

Am I gay?