Are you using impending termination as an excuse to make sure you don't get close to him? If you're afraid of getting close to people, you might be unknowingly using eventual termination as your excuse to not get close to him as well, and you are impeding your own therapy. Ideally, he won't leave until you are ready for him to (unless something comes up that's unplanned), and when it's time, it will be easier.