The best way I can relate to this is by thinking of when my sons were applying to and going off to college. They hated any talk about it even though they were excited to be going. I think we all have anxiety about the unknown and especially someone who is depressed may fear even positive change. And if they feel you are trying to sell them on it, they may resent it. If I were you, I would stop discussing it for now and take your cues from them. If they ask questions, answer them but otherwise, leave it alone..