well when yu talk to him you dont have to focus on the fact that your stressor is missing him. you go to therapy 2x a week that you will be missing, not only when he is gone, but tack on the time that you will be gone as well. so you can go in there and talk about your stress and anxiety over missing 3+ weeks of therapy and how will you cope while BOTH of you are gone. The voiced focus does not have to be on missing him specifically.