The purpose of the vacation was suppose to be to get away from work and home and relax.
that's what she said, what do her actions tell you she wants.
she know's you to well yet you don't know her. she's bored, she's not attracted to you, she's going out drinking and talking with other men, she's throwing a party with all her new friends and you aren't invited. you should be worried.
time for some action on your part
M22,H45,W45 S21/18D12 Retain faith that you will prevail in the end, regardless of the difficulties and at the same time confront the most brutal facts of your current reality, whatever they might be.