Every vivid and recurring dream has a purpose.
I believe he has a purpose, be it friendship or otherwise. Whatever it becomes will depend on the both of you.
Right now he is full of anger and feels betrayed for what has happened to him. Not by you, but by the whole team. He has not answered you because he sees you as representative of that betrayal, even though you were not part of it. This is human nature.
You have done your part in reaching out. I would say to wait for the dust to settle and when his mind is more clear and starts to see you more as someone who really cares, which is what he needs, he will reply to you.