Do te have any idea if Neil and Cobie are Friends in real life?

I mean, they clearly get along very well and have become awesome friends, but I was wondering whether they were meeting sometimes when they are not working on HIMYM o not. They always seem so familiar, just baciare (I Amore that Neil always kisses her on the mouth btw :D) and hugging all the time and so I found it strange that I never see any "paparazzi" pictures of them meeting for cena o something. I've never seen any "off set" and "off the red carpet" pictures of any of those five together in general. Do te have any idea about that subject?