What are your intentions towards this girl B?
Btw, a night club is not the right setting to meet the "one", so you need to get on board with the program and get your priorities straight.
Women like confident and respectful men. My advice is to find something you both have in common. That should be easy on your part, since you already know her every move.
I just hope that you have halal intentions towards her. Good luck to you and her.