<human>: Can you give me the gist of the text in a nutshell?

Hi, I'm 21, I met a girl at my sisters party on Sunday just gone (she's a friend of hers) and she told my sister she liked the look of me etc and wanted to talk, she left before I had the chance too.

 2 hours or so after she left she messages me on Facebook and we start talking. On Wednesday I asked her if she was free at all on the weekend to go for a drink and she replied she might have plans but she'll let me know...

It being Friday now I don't want to it be last minute organisation, should I ask her about it? Or just leave it as a ball in her court thing? 

Thanks for any advice! Have a good weekend.
<bot>: Met girl at a party, talked during the week, asked to meet on weekend but she says 'she'll let me know'.