Hahahaha.... social anxiety.
Okay, it's pretty common to feel awkward sometimes—especially in social situations where you don't know a ton of people. Making conversation or going on dates can be nerve-wracking! And I really don't know if anyone is a pro at keeping it cool. You'd be surprised how many people are internally freaking out even if they don't show it on the outside.
Bottom line: being socially awkward happens to the best of us. Our best advice? Keep calm and be yourself! So generic, right? But seriously, it adds a shit ton of pressure when you start trying to be someone you're not. So go in there and be your awesome self!