Hey man - you didn't tell me you finally made the jump. Congrats. Glad you're doing it and hopefully one day I will be able to join you here. 1 in 4 right?
So - I'll throw my 2 cents in and say that most of your interactions have been planned in advance. Because of that, you have always had the chance to get your game face on. You have been doing that for a while - so when an interaction changes from an expected 5 minutes to an hour...well of course that is going to throw you off some. It just takes time bud. The more date nights, game nights, etc that you have the easier that will become.
Remember the day when she dropped in on you guys at the movies..same kind of thing.