I've never had my heart broken as badly as you did. Being wrongly accused of terrible things hurt like nothing else that's ever happened to me. My heart has been beaten and battered by the man I love most in the world, and still, I can't hate you.
Actually it was Rose. The hotel complex was all about faith and who did he believe in and lobe more than anyone in all of space and time? Rose Tyler, she was who was in his room and that's why he went "of course, what else could it be" bc it was Rose