You are sounding strong and clear in your thoughts. It is good that you were not emotionally impacted by B's decision not to talk to you.
I think it is interesting that you describe your current house a tomb for your spirit. It is, indeed, very difficult to move forward in a place where we once had very different hopes and dreams. When one has done all the processing and feeling you have done, it is clear you are not running away. Rather, you have done the work you can do and now, for your own health and well-being, you need to move into a new space for yourself - both physically and, perhaps, emotionally. A new apartment will certainly help. It is great that you are excited about the neighborhood for your boys, I know that is so important to you from all you have told us here.
