Is it too soon to give up hope?

[2ndtimearoundCA]

Hopefully somebody is reading this because I need some advice now. I am feeling a little like a doormat. So w canceled our Vegas trip 2 days before without explanation. I initially wanted to be a little more openly upset, but i eventually opted to sort of blow it off. I did send the following text last Friday

"Vegas would have been an amazing fun time (her name). You suck for canceling."

Telling her she [censored] was an attempt to mirror her joking language that she has used lately. I am not sure how she took it. She did not respond and about a week went by before we had the following exchange yesterday:

Her: (my name), any word on the refund checks? It's been 1.5 months... Seems like a awful long time. I really need the money to pay down some of my cc debt. Please let me know status. Thank u

Her: I also need to get my mail. Is there someplace you could leave it so that (her son) or I could PU?

Me: (6 hours later) please don't stop believin (per the advice of Journey).. Checks will eventually come. But maybe check with (tax lady) for more info. I'll be around next week for mail PU

Her: (instantly) Funny guy... I certainly don't believe in the government or state run agencies. I will email (tax lady). Can I pick up mail Monday afternoon?

Me: (2 hours later)yeah ... Come anytime

Her: (5 hours later) Can I trade cars with you for a day? I would like to move my bike over & I need to purchase a few small furniture pieces for my place. Thank u in advance for considering my request.

Seriously.. She wants to barrow my car??? This woman is bizarre .. It's like the whole Vegas thing never happened. I really didnt want to make this about the money because money durring our relationship was unblanced toward her. But I had to take a pretty big loss and now have flight credit in both our names. How do I respond?