I understand her point of view, she had send him a message about everything, she doesn't know that he didn't receive it...and she just don't wanna remember her painful past experience, what is reasonable. She doesn't wanna to talk about it. Running away is her mechanisms to deal with her pain and frustration.
I don't blame her for it, how many time did I choose to run away of something to avoid pain?
And for me, he is such a pain somethings , because he is forcing he to talk about something that she doesn't wanna to. Do you like to be force to do something that you don't wanna to do? Well, I don't, so I get why she is pissed with him.