This is where I would start to wonder if these girls weren't sharing more than just friendship and I was just too naïve to realize it and what had been expected of me or possible on that single night out. Am I weird?

on the other hand, there was a lot of passive-aggressive stuff going on in the interaction, brown-eyed girl, on your part, where you could have been more direct, you sounded a lot like me, that's why i'm saying it, it was very familiar to me. to have a friend, be a friend. develop your depth and your strengths, and you will have friends coming to you.