goodness, he goes away for FOUR months every year? sheesh. what if you brought up how the waiting in between is agony, and you don't know what to do about it? not necessarily bring up termination, but you could say "it is so stressful that i even think about ending therapy because of it," where it isn't you blatantly saying you want to terminate.

either way, he shouldnt just be like "welp, lets start that process!"