Get it, Tabby Cat
Complimenting your eyes + saying she's "familiar" with you = DTF. Doesn't need to be a relationship if you don't want one (you've mentioned that before) and if she's really that young, might not be a lot of common ground- could be wrong though, how old are you again? I'm 38 and a couple years ago when I started the online dating thing I interacted with a few twentysomethings and they all seemed like children. But hey, I'm sure there are more mature ladies in that age group out there.
When you've made the noise complaints, has management mentioned anything specific they'd do other than just make a note of it and maybe talk to your neighbor? Because you're right- there should be some sorta repercussions if you're complaining this often.