I'll try and keep the back story as short as possible... A couple of months ago I met a girl (one of my friend's, who's a girl, younger sister) at a music festival, very attractive (a solid 8) kissed closed and number closed her. One of my smoothest closes. The next day, she texted me and we've been exchanging texts since. I couldn't meet up with her for about a month however, because I was out of the country for 4 weeks. Still, I thought I'd stay in contact and try to make a move when I got back, and we continued to exchange flirty messages during those 4 weeks.
When I got back, I went out on a bar crawl before heading to a club with some of my guy friends. The aim of the night was to get stupidly drunk and have a good time with the guys, no intention of sarging or anything. At the night club, I ran into *drum roll* the 8/10 I met at the festival! This is where my memory gets a bit fuzzy... I only remember dancing with this girl (and her telling her friend to go away because we were dancing) and regretfully me telling her I really liked her. Her response was something along the lines of "It would be a bit weird if anything happened between us seeing as though you're my sister's friend"... We've only exchanged a few texts since then, but I noticed her texts were a lot less flirty. My immediate thought once realising this was to freeze her out. So it's been about a week since I last sent her a message or spoke to her.
My question now is, has this drunken mistake blown any chances I have with this girl? If not, what's my next move to get things back on track? I've never had to freeze someone out before, so I don't really know when "a safe time" to get back in touch with her is and start gaming her again. Under regular circumstances I would probably just move on to the next set, but I see her as potential girlfriend material and don't want to give up.
Any help or advice would be much appreciated!