So I just got called "annoyingly apathetic."

Backstory, I invite this chick to go on a bike ride with me. She says she doesn't have a bike. I tell her to buy one. She laughs it off, and says she doesn't want to hang out with me anyway. I say okay then enjoy your summer, see you around.

Now this is the good part! (?) She says, "Why would someone want to hang out with you when you talk like that?! you're so damn annoyingly apathetic!"

What the actual fuck is this response? First time having it. Send help. What did I do wrong/how to respond/Why did this happen?