Well, it's only been a week, so you might be reading too much into it. All you can really do is keep talking, with him and other people who understand. Maybe take a look at why you are feeling like this week is so tough for you that you are starting to compare how he is with her to how he is with you. What I mean is that you should start with examining your own feelings and thought processes rather than focusing on what's happening out there with him. Just to start unraveling the discomfort. Do you have a need to be in control and know where things are heading? If that is the case, then when things are unpredictable it is easy to feel disoriented and negative.
The world opens up... when you do.
"Oh, oh, can't you see? Love is the drug for me." ~Bryan Ferry
"Love and the self are one . . ." ~Leo Buscaglia "