I've moved in with my boyfriend by now... it's not always easy but it's getting better!
I discovered that I have the most success "going" when he is at home and we are not in the same room... for example when I'm doing laundry and he is in the kitchen - sometimes I get the urge and can go.
But holidays are still awful.
I think my problem is leaving a room full of people and then "going"... I never get the urge to go in these kinds of situations!