What should I do the next time I see her? I relaly want to kiss her?

I like a girl who says she has a girlfriend but she's been hitting on me and flirting with me playing games with me lately ever since I admitted being attracted to her. She says she's confused and doesn't know what's happening between us and to be honest neither do I. She's been acting pretty single to me whenever I'm around, asking other people whether I like her, whether I'm checking her out too and stuff, getting all flustered when I'm around her. She told me she had a girl after I told her I wasn't sure about asking her out and when to meet alone cause I don't know what's going on. I want to break that barrier and get intimate with her, probably kiss her when the chance comes by. The whole of the LGBT group's goin out next weekend and she'll probably be there. I missed the last one cause I got cold feet and her friend thinks I'm interested in her as well. How do I separate her from her friends and get my kiss? I don't like interruptions or them hovering around us, they're alwayd trying to down play her. I've never had a lesbian relationship before, but I just want her, to give her a try?