It sounds like a bad idea to do anything, if you are coming from an activated triggered state. APs can make bad decisions, when they are not well-regulated.
You write, that you are seeing eachother casually. So you havent agreed on seeing where this relationship will lead you yet.
Maybe she still thinks, that you are only casual, and why would she think anything else ?
You know that shes avoidant - so you also know that they move slow....
Expecting an avoidant to text back within a couple of hours is a bit too much to expect from a casual relationship (with an avoidant person) - or with anyone.
By the way - what do you text and why do you text her ? What happens right before you text her ? What is it that you expect, when you text her ?
What is it that you want to talk to her about on New Years Eve ?
Do you want to give her an ultimatum or ?
Do you know what you want with your dating ? Do you know what she wants ?
People can date for many different reasons.
APs can want other people to read their mind, and when they cant, the AP can get pissed.
Do you know your dealbreakers and whishes, wants and values to a relationship ?
Are you having diffculty knowing what you want - what feels right for you ?
Maybe you already know, that your casual relationship is a no go, but then you start doubting yourself ?
Maybe you are only turned on, because she is avoidant, so that you have to chase her ?
What would happen if you just stand still and dont chase ?
Talking about serious stuff when you are triggered, tired, tipsy, stressed out ect. is just bad timing imo. Im also against having serious talks on New Years Eve.
Some self- regulating tools:
jebkinnisonforum.com/post/13006/