There was considerable groans and eye-rolling at our place when we heard the Doctor moan again about Rose in the last episode.
We both felt that the Christmas episode was meant to deal with this, that CT enabled him to re-discover some joy post-Rose.
Now though that therapy seems to have never happened and it's almost insulting to the new companion to be compared. I think what really gets to me, and maybe this is more for the older viewers, is that the Doctor never pined this way before - something that was at least brought up in "School Reunion".
Yes, I know Rose was meant to be special, that the relationship was different, but I never saw why she was considered special. I found the SJ relationship better or perhaps the more paternal one with Jo.
And whilst RTD does do unequited love quite well, I hardly think DW is the paragon of human relationship on TV...