OK, it's obviously time for me to set some boundaries here. hahahahah

How about just emailing him on or around Thursday (since that would be a day before your session), and pick just one thing that you really want to say to him. Imagine that he said to you... although I am going to be away, we can still have one five-minute session. What would you say to him? Judging by what you wrote, it is obvious that it is very much alright with him if you email. Maybe talk a little bit about how you were mad last time? It seems to have come up quite a bit since then, from what I have read of yours.