I'm a Mess at Parties

Okay, so I admit it, parties are my kryptonite. As soon as the first DJ song starts spinning or the chatter gets too loud, my brain just shuts down. It's like, 'Oh, no, I have to talk to people? Fine, what should I say?' And then... crickets. I've tried a few times to fake it till I make it but honestly, I'm just there for the snacks and avoiding eye contact. Everyone else seems so chill and relaxed, while I'm secretly planning my escape route or wondering if anyone noticed that my hair got messed up by accidentally hitting the food buffet with my head. So here's my question: is this normal? Do other people feel like social outcasts at parties too, even though they look perfectly fine on the outside? Or am I just destined to be a party wallflower forever?