Is this the worst situation to be in with a girl ever?

Don't acknowledge or contact her at all. It was your interest that put her off in the first place, all girls get it and don't even realise that's why. After a while she will start to wonder why you aren't interested in her again and the thought will grow until all she wants to do is get your attention. Make her work for it, don't give in at the first sign dude!