For context, shes in her early 30s.  

I have a close friend at work who in her words, lives and deals with extreme anxiety.  Over a lot of things.

She doesn't ask for things.  Ever.  I've known her for a while now and she has never asked me for anything even if she really needs it. I have to figure it out myself.

She never expresses any of her wants, desires, needs, or truths.  If someone does something to slight her she redirects it back to herself instead of vocalizing any sort of displeasure eg "oh its okay it's my fault" or "it's okay it'd not that big of a deal".

Even trying to ask her questions pertaining to her hesitancy in this regard leads to her completely shutting down.  She does everything in her power to avoid any sort of confrontation or any sort of discourse.

..which is fine.  I'm not trying to change her, I just want to understand her so I can better accommodate her since we do spend a lot of time together.

Please help me understand.  I'll also gladly answer any questions if anything needs clarifying.