Bright - I am no vet, but I'll give you my 2 cents and you can do what you want with it.
Rather than worrying what HE is up to (which you can't really know anyway), my advice? Try to take a little time and figure out what you want to accomplish in this conversation with him.
To me, what you should do depends on your goal. I think you have to figure out whether you want him to know you are there and the door is still open, the door is closing or the door has closed. If you are still unsure, then act as if so as not to disrupt anything.
Thinking of you...
Me 41, H 47, M 15 yrs, S11, S13 BD 1: 11/4/14 we work on it; really I pretzel myself BD 2: 3/31/15 H goes down to "dorm room" 8/15: H back to MBR 10/15: H back in dorm room 1/18: H files, now divorced
