I do this all the time. I practice what I'm going to say to her and what she's going to say back, tell her in my head about small things that have happened, and imagine her reactions. It's like she's always there. Or I want her to always be there. It drove me a bit nuts at first - I think because I felt like it was 'wrong' in some way, but now I'm used to it and mostly find it comforting. I found telling her that I do it helped. It definitely intensifies during breaks.