falling behind

My best friend told me he got his first kiss from a guy this past weekend.
I asked him if he ran home to write about it in his diary. He didn't, or so he says.

Me and Best friend met in highschool. He was a late bloomer, I was just awkard looking. We hit it off immediately, loving to make up stories and basically improv our way through the school day.
Everyone thought we'd get married. I did too, sort of. Definitely on a mental level he was one of my soul mates (we've kind of grown apart- i'm more dour).
He hit puberty and starting looking like the lead singer to Maroon 5/Jude Law. Ya. I really had no excuse not to like him. Only thing, he was acting ambivalent with me too. Sometimes flirty, sometimes not.
I came out to him via IM, but he thought i was just joking/overreacting. It wasn't until this year that he came out to me. Finally! our friendship became more honest and relaxed. No weird 'why aren't we dating' moments.

Anyways, it's funny how the one thing that strained our relationship was something we shared- being gay. Only i'm not half as girl-crazy as he is boy-crazy. For me, it's because it's harder to tell if a girl is just being friendly or flirty, so I don't let my hopes ever go up.
Anyways, i'm at home, studying, doing not much socializing. And he's getting looks and makeout sessions already! and hugs from hot guys. I just feel scared about being left behind (in the social aspect) again. I've kissed a few boys, but i've never kissed a girl. I wonder if it'll ever happen. I don't want to miss out on anymore, but I don't know how to get started.