Because he's hundreds of years older than she is and she's trapped in a parallel universe.
Rose and the half human Doctor are still together living in a the parallel world, Rose and the real Doctor were never together.
The Doctor told Rose "Run!" at various points in the series as they faced dangers together.
Yes, Rose returns from the parallel world at the end of episode 12, at the end of episode 13 The Doctor returns her and clone Doctor to her world to live their lives together.
After being trapped in a parallel universe, Rose continued to live there with the meta-crisis Doctor created from her DNA and the Tenth Doctor. In that universe, they went on to have a life together and presumably continued their adventures.
Journey's End (series 4 episode 13). - Edit: Episode 14 is Journey's end.
Yes, Rose loves the Doctor more than anything and the Doctor actually loves her too.
No. Rose won't be with the 11th doctor. you can't be the doctor's ally forever the doctor needs new allys after he regenarates.
no, rose is in parallel world .
well yes because the ninth doctor, the tenth doctor, the eleventh doctor etc are all the same person inside. the tenth doctor met rose (david tennant) and i suppose the doctor will always love her even when he regnerates
When Rose first meets The Doctor it is stated that she is 19 years of age.
rose
Rose doesn't marry anyone.