Which is not, in any way, clear in the text. It feels like a stretch and it shouldn't because it's the plotline that's ongoing and, yes, more important. The Doctor has mentioned no one else, including his "adoptive family", has not mentioned the war and Gallifrey (a word that wouldn't cause ache...), and we're left with a standard romantic movie story of some guy getting over his lost love. No hint that this is his eternal tragedy, no suggestion that for him there will never be true solace.

And in two full years we never had any recognition in text that Rose's importance rests on circumstance, which doesn't help here when Martha's compared negatively to a girl who was in the right place at the right time. It feels like special dispensation is unfairly being made for a character we know Rusty could seem far too fond of his own good (it's Whathisname that fucked it up in tSC though).