I have recently dated a girl who told me she is "autistic", because she "sometimes gets hyper focused on things", but I didn't agree with it, and didn't think much of it, because she's actually a successful entrepreneur, and she's smart, and looks completely normal to me, but long story short, she's been recently going through a lot of stuff, and she didn't wanna go out again because of it, and at first I was completely okay with it, and told her I'm always gonna be there for her, but then she started messaging me less and less, and then she just stopped, and we hadn't talked in 2 weeks, so I messaged her if she wants to meet me, and she didn't respond, so 2 weeks later, today, I messaged her again, and told her that it's hurtful to just ignore me without any explanation etc. etc. and she responded by saying this:

  
"I thought a lot about talking to you, but my anxiety got so overwhelming that I couldn't bring myself to", and "It's not something you've done, I think I just fell into a mentally unstable situation and I'm not quite sure how to interact with others lately". 

I can understand about the mentally unstable situation being caused by overwhelming stress, but why is she feeling anxious about talking to me? What is that mean when someone has anxiety over the thought of talking to you? Does that mean she feels uncomfortable with talking to me?