I do talk with her, mentally though.
Sometimes it's in my room, when I'm alone. Mostly our conversation are about current issues, ethical points of view and evaluating ourselves and our relationship.
I think it's a great method of looking at things in a way you aren't used to, expanding your own perception through reflection.
In special ocasions if I can I sneak out to some "special place" of the sorts. It's some kind of private place in a garden, not much people go near the site so I can relax and contemplate nature while thinking of her. It's a very nice sensation.
Of course it's not 100% "perfect" as some people go there sometimes and more than once I found it occupied/got disturbed while being in there.
However, since I only go there during "normal hours" and I talk mentally it only gives the impression that I'm chilling out sitting in a bench.