Somehow I find it weird that an extrovert is asking introvert for some room... or maybe not... I think introverts tend to be more intense with their partners.
ISFJs I know don't usually show up their negative emotions, and tell you what's bugging them with you (even though they are willing to complain just about anything else but you). They also tend to be highly cynical towards what's said. They believe in action.
So, with actions you can prove that you care. But ISFJs a I know don't like anything fancy, something nice, kind and cute will do just fine. But it has to be lasting, not just one time thing...
My own ISFJ once said that it's weird how we never do anything fancy or extraordinary, like expensive restaurant evenings, costly vacation trips, etc... and she said she likes it that way. It's just me and her (that's the most important part... sharing the time with just one person at a time), maybe a movie or a board game.. some ordinary food and ordinary music. Very plain and simple. Just the way we ISxJs like it.
Even thought this does not answer your question at all, I hope it gives you some insight about ISFJs. That should help you to better understand his needs.
Edit: Oh, and some unhealthy ISFJs I know tend to get hurt very easily, so that other's would pity them and agree with them. They use guilt as a weapon, and are very good at it.