Not necessarily. I would get depressed and figure no one noticed if I disappeared. And of course few people did. (So I thought). But if someone pestered me about what was wrong with me or told me to buck up I would just get irritated. I don't talk about feelings, especially back then.
You can show you care and check up on him in other ways. Just stop by or send him a note that says hello, thinking about you, have a good day, etc. totally harmless stuff. But don't ask if he's ok, what's wrong, do you want to talk about it. Don't put a ton of pressure on him to snap out of it on your terms. He will in his own time.
I stopped disappearing on my husband by the time we got engaged. I disappear on everyone else though. :)
Good luck!
