Hello!
How long does a panic attack last? Has he gotten over it and just deleted me like that from his life? Does he never want to talk to me again? Or does he take it as indifference that I haven't spoken to him at all for 2 weeks now?
I don't think these questions can be answered with any assurance because the motives for why people act this way vary greatly from person to person, regardless of their disorder. For instance, I have Bipolar Disorder (BP). But if you were to read on paper the history of my behavior over the last 10 years, you might think that I don't have BP, etc.
I assume he told you about his issues himself. But he may have other issues that he doesn't even know of, that contribute to how he is behaving.
At any rate, here is my advice. Is there a way you can contact him that doesn't have the immediacy of talking on the phone, like e-mail? I say this because you can then freely ask questions without him feeling like you are cornering him into a situation that could cause more aggravation for him and leave you more confused.
Whatever the case, if he does come back, you have to realize that this sort of behavior might be repeated, or something like it. I am glad he is self-aware, but there are limits to the control we can gain over our illness even if we are self-aware and do the best we can.
Good luck.