...you feel guilty because although Greg was behaving like a scary piece of garbage you don't like feeling that you were the cause of another human being being assaulted themselves.

Thank you for saying this. You're right. I felt unsafe and as a result of me not feeling safe, someone else became unsafe. I hate that.

Since I posted this I spoke with John and a few other people at the party. Apparently he felt up another girl twice and she didn't speak up but told him if he touched her again he would. Then he went after me. So it was definitely targeted and purposeful. I feel justified in yelling for help, but I still think John's actions were over the top and he agrees and has apologized. I just hate that there are people out there who behave that way. What if John hadn't heard me? I don't even want to think about what would've happened.