I always wonder what this is like. I have one group of friends which is almost completely male apart from like 2 girls. I know that a lot of the guys want to do unspeakable things to these 2 girls, and they must know about it. Must be so awkward.
I was in this situation in high school - our core group of friends was me, one other girl, and six guys. One of those guys was dating the other girl, so I was the only available girl in the group. I ended up dating three of the guys throughout high school, but they all admitted they had crushes on me no matter who I was dating at the time. I knew it, which is why I decided to give them a shot. Turns out it didn't work out with any of them.
I stayed friends with the guy who was dating the other girl. We actually live together, now. He and I were best friends for the past 2-3 years, we'd do everything together. A lot of people assumed we were dating, but we didn't. Friends, and my mom, always told me he was in love with me but I always brushed it off. Turns out, he was. It made for a really awkward few months of him trying to be with me, and I just wasn't attracted to him.
It really sucks. Now he's stopped hanging out with me as much (yeah, even though we live together.) We're still best friends, but we used to go to local bars to watch sports games or go see a movie the two of us both wanted to see, but we don't do that any more and it's a little disheartening to realize he only did those things because he wanted a relationship and once he realized he wasn't going to get it, he stopped hanging out as much.
This was long. Sorry.