You're like my fucking brother...!

   On Saturday one of my buddys had a Halloween party at her house. A lot of people went which for me means more anxiety. I decided to just turn in early and crash in my best friend's car. I was almost asleep then her little brother and his friends all climbed in the car. But I was like, whatever, they're pretty cool kids and I wasn't too tired. Then her little brother just started acting really weird. And I know it's typical that if you are in a car with three 15 year old boys, sex will come up. So we were just talking about stupid things like that and all of a sudden my best friends little brother, who I consider to be my little brother, tried to put his hand down my shirt.
   I freaked out and he just kept saying, "It's not a big deal..." I told him it was. Then he tried getting in the same seat with me and I was like, fuck no. I was so uncomfortable. I started pushing him away, yelling at him, hitting him and finally one of his friends stepped in and told him to leave me alone.
   And this isn't me relapsing, just a thought. I couldn't help but think of Bobby. He was like my brother and he fucked me over. Now Bro? I'm like immune from having a close male friend I guess.
   I was really weirded out by it and I told my best friend's boyfriend and another one of my friends but I am really scared to talk to her about it. You know, I don't think I will. But should I? Guh... Life is so hard! Hahaha. Is it even worth mentioning? Am I over reacting? Advice...?