I had a similar problem, I guess. A lot of people here talk about how their yorkies can tell when they are feeling the slightest bit upset or under the weather. Thor, on the other hand, will fall asleep on my lap whether I am laughing, crying, or having a stroke. It sort of bothered me until a friend pointed out that just means he's really comfortable with me. I would love to think that's what it is because poor Thor is a nervous little guy.
Thor does whimper sometimes when I leave, but usually that's if he's not sure about where he's being left. He's pretty chill when he greets me, sometimes he won't even get up off his bed. That doesn't bother me though, we spend so much time together, I guess he's not that surprised to see me come back.