Don't text, call or speak to her.
If you go to this bar, let her come up to you. When she does, she'll be like "sorry, wasn't feeling great" or something.
Then say, well I ended up going out and had an awesome night.
Then, DO NOT ask her out again. If she asks you out, then you'll have to play it cool, sorta like "Well, I dunno.....you flaked on me before you'll have to make it up to me"
Then she'll be qualifying herself to you.
If she doesn't mention it, nothing is likely to happen here, so get on the game
For future, I wouldn't have text her/called so many times, made you look a bit needy. And if arranging something, I always prefer to talk rather than text.
Hope this helps!