:3
ooh, maybe if they've been friends for centuries it could have always been that way. The Entruster really liked her, but never said anything and instead focused on being a very good friend to her...then she met the Doctor's dad, and they got married, and the Entruster was in the background, still being her good friend but all sad about losing her...then her husband died and he was still a friend, though was too scared to say anything out of respect for her grief at losing her husband and for what a good man her husband was. and he doesn't think she feels the same. So he stays in limbo.
*squee*
too cute.
the fun one can have with making up random backstories for secondary characters