So asked a girl out across departments at work (we don't work for the same department and she's a temporary summer employee). I ask her out next Saturday (after the temporary summer job ends). She said yes, I find out today was her last day. I say oh we should probably swap info then (figuring I'm never going to see her again). Hang around after my shift and ask her you want to swap info now or later (I had a later shift and wasn't sure if I was going to see her). I get approached from my boss saying he doesn't know if she said yes or not but I'm making her uncomfortable.

I don't know what I did to make her uncomfortable. I wish she would have just told me instead of me hearing it from my boss. I am concerned if my boss knows it's gossip/drama so it's going to spread like wildfire. I'm not even sure it's something I did, maybe she just heard something negative about me.

I'm thinking of never talking to her again and avoiding working with that department for the next week till they all leave.

What do y'all think? What did I do wrong? Did I do something wrong? Is my course of action the smartest?