For the record, I was initially not even invited. It was only when one of our mutual friends suggested that she invite me. She takes us to a fancy place, pleads us to order food and drinks up to our satisfaction. When the bill was placed in front of her, she just glanced at it and placed it back in the folder. After 10 seconds, we realised she wasn't gonna pay and that's when we split it equally. It has been a well and I haven't talked or looked at her. Not that I'm broke or anything, but it's almost the end of the month and I could have easily had at least 8 meals in that amount.

TL;DR Friend invites me to bday party, realised the bill is too high, we split the bill