Man, why do I ever have to deal with unrequited love? First, this girl Angela from high school, and now, this?

I just met this girl Karen, five weeks ago, and we're friends. I dunno, but I feel like I'm falling for her! I'm in love with her! Is it too soon to say I'm in love? I mean five weeks? We haven't talked that much (she's shy, I'm shy), and I've only hung out with her once! And now, here I am mopping, because I hear her big sister and little brother (my age) talking about matching her up with some artist guy! And I heard her sister say that there was a possibility that she liked the guy too! Then, her best friend (my crush's best friend, that is) s in, the teasing begins, and before you know it, I'm in the hot seat! And here I am, shy as ever, when it comes to girls (but I wasn't shy with the other one in high school), tongue tied, and couldn't express myself! I couldn't even tell her I like her, or that I'm falling in love with her! I can't even ask her out! What am I to do?!?