I had this a couple of years ago, when I was 16. My best friend and our boyfriends went out for a chinese and the bus home was an hour away, so we went to sit on the prom for a bit. We were happily chatting away then about 6 pissed chav girls came up asking if we'd "started on their mate", when they blatently knew we hadn't.
The shortened story, the girls start hitting me and my best friend, her boyfriend pulls her out but I'm left.
I wasn't all that hurt really but I was still far too scared of going into Town at night (and sometimes in the day) for a while. After enough times though you realise that really, nothing is going to happen, and now no-one can stop me going out!
Hope you can sort it out, just try not to think about it too much,