Not talking in absolutes here, but this is the other side of plate spinning. Just like men use attention to get sex, women can use the possibility of sex to get attention, and this is often how they spin their plates, keeping men engaged and orbiting with just enough closeness or flirtation to maintain interest without offering real progression. Women value attention while men value sex.
You already asked her out. The general consensus is that she is the one that has to ask you out next time to move forward.
Yes - if she wants to spend time with me she has to ask for it. I am not doing this again - once is enough. The fact that she is talking to me is encouraging on its own, but I am not getting too far ahead of myself, not this time. Besides, there have been plenty of times so far where I either stood right next to her, or sat across from her in the same aisle, just reading my book and minding my own business. I've said this before but to me it feels like she is playing games and I have zero time for that.
And I know she works in the financial industry, we discussed our careers once before. Yet I am farther ahead of her in the money game, unlike many people (herself included) I have my money working for me every day. As of yesterday, I made my first $100 on the stock market without day trading - because I work full time otherwise I would try day trading - the way I see it right now is that my life is interesting enough without her in it, and if she can't see what she's missing in me than that is her loss, no skin off my back.
As of three weeks ago, I started a home workout regimen, coupled with a weekly gym session with a good friend of mine on Saturdays. That has been the highlight of my week so far. Plus there are plenty more better looking women at that gym than her, so there is no need for me to wait for her to make up her mind or stop playing games - again as per above I have no time nor the patience for that.