<human>: Summarize the given text in a few sentences.

As the title states we have been talking about a month, mostly texting because we both work strange shift hours with non-normal days off. I am attracted to her and we have a lot in common, there is a mutual attraction between us, she admits. We sometimes talk on the phone for hours getting to know each other. We see each other in a professional setting where it is not practical for me to approach her on any other level than a friendly aquaintance, but we are not co-workers. The girl in question is not in a relationship, but admitted she is still in love with an ex who cheated on her last year. She is also pretty much a loner and is always telling me she is doing absolutely nothing, when I ask her what she's up to.

We had originally intended to meet up several weeks ago, but I had forgot a prior commitment and rescheduled for the next day. She bailed out on that day after a no-show and said she had a doctors appointment.

Fast forward two weeks. I get off work early and hit her up asking if she wants to go out. She says she is down, where are we going. During the middle of the phone conversation she abruptly says hang on I'll call ya back. An hour later I text back saying, hey forget it I got bored waiting for you to call me back. 

We have had plans for a week to meet up tomorrow, but I have a feeling it's going to be much of the same. 

Question to redditors: Where do you draw the line on when to call it?
<bot>: Girl has flaked twice and has a loner mentality. Have plans tomorrow. Where do I draw the line and move on?