Think it would be better to discuss why those emotions are so strong & why you will have such a hard time. Emotions are not to be ignored....they are there to point out that something needs to be handled & understood better so they can be handled in a rational manor. What is behind those emotions from maybe your past is probably something serious enough to be a topic with your T.....even if you don't want your T to know how difficult it will be, just the concept of having problems when someone you feel close to is going to be away could be topic enough to be discussed along with learning some better skills of handling the emotions than ignoring that they exist.