Am I wrong for resenting my friend for this?

So when I was 11 I was a pretty shy tlimd person. I was kinda bullied and nobody liked me. I have this friend named Rachel. Rachel liked me but her friends always were unfriendly to me. It was painfully obvious but I never said anything because I didn't want to be a snitch.
So, for Halloween Rachel invited me to a Halloween adventure dorm party in Vegas. Her friends met me. They were cold and indifferent. I was told to shut up a lot, at least one of them said I was stupid and the money I bought with me was suddenly "missing". The trip was pretty awkward. Rachel tried to make me feel better. We shared some nachos. I was happy when our time was over. I lied to my family about having a good time and just tried not to cry when I got in the car. I felt terrible the entire time



Later Rachel told me she found the money. I let her keep it because I didn't want to be a "jerk" or "snitch". In addition I didn't want my parents to have to drive too far out to find her or have to be honest about how horrible our day out really was since I lied and said it was wonderful. A part of me kinda hates Rachel. Since I never expressed to anybody how terrible I really felt.

.....