history: I'm very socially awkward I'm very socially awkward and tomorrow i'm going to have a playdate with some local moms and i'm so anxious I'm right there with you.. I still feel pretty introverted_comma_ but since coming to college_comma_ I've been forced to socialize more_comma_ and it's help me at least "fake it until I make it." I still prefer to be alone a lot of the time_comma_ but at least I can somewhat manage without making myself look dumb. Maybe you can just think of some topics/things to talk about to have in the back of your head for the times when things get quiet?
current: that's a great idea! thank you for a great advice. 
next: I hope it goes well! If it makes you feel any better, most of them are probably just as nervous and are looking for any excuse to relax and let their guard down, too. Good luck