Truly, madly, deeply. To some, companion Rose Tyler was the greatest love of the Doctor's life. He seemed to have a closer bond with her than almost anyone he'd travelled with before, and as time went on it was increasingly clear that she was deeply in love with him.
Perhaps not a character on Doctor Who, but surely the Doctor's greatest love throughout all time and space is the TARDIS. Far more than just a machine, the TARDIS is a living being and is the only traveling companion that has remained with the Doctor throughout all their adventures.
Settling into her new life with the Meta-Crisis Doctor, Rose later became pregnant and gave birth to a daughter. Years later, she was briefly transported to her original universe and met the Eighth and Eleventh Doctors, after which she returned to her family.
Rose Tyler eventually got her happy ending with the Meta-Crisis clone of The Tenth Doctor, but the show never explores their future together. The finale of Doctor Who season 4 saw Rose Tyler return to the parallel universe from "Rise of the Cybermen," only this time, she was accompanied by the Meta-Crisis Doctor.
The theme of the lonely Doctor is not a new one, he travels all of space and time alone, never settling. This theme makes it easier to introduce companions, since the Doctor by nature has a longing for companionship. And at the time he met Rose, probably more than ever, he felt utterly lost and alone in the universe.
In the Doctor Who Confidential episode End of an Era, executive producer Julie Gardner confirmed that the intention was that the new Doctor did indeed say "I love you" when he whispered in Rose's ear. On screen, this character was only ever referred to as the Doctor.
She didn't want him to join her in the TARDIS but was upset that he was leaving to defeat Cybermen once he did join. The writers let them fall apart to the fault of both characters and even included Mickey cheating on Rose.
although he once indicated he was merely a year older than Rose, placing his birth around 1985. (PROSE: The Doctor Was Involved in the Dummy Massacre [+]BBC webteam, Who is Doctor Who? (BBC, 2005).) "Family lore" held that on the day Rose Tyler was born (around early 1986), Mickey visited her in hospital.
In "The Doctor's Daughter", when discussing the topic of parenthood, the Tenth Doctor confirms that he had at one point been a father and that he lost his children 'a long time ago', saying 'When they died that part of me died with them'; the nature of their deaths, however, has never been explained, as it is suggested ...
Clara is the future child of the Doctor and River who's had her memory erased. The two Time Lords must be up to something on their nights away from River's prison cell.
Official confirmation that Yasmin Finney is playing Donna Noble's daughter Rose debunks a major theory for the 60th anniversary specials. Donna Noble's memories of the Tenth Doctor have likely influenced and inspired her daughter Rose, who has taken on the name Rose Temple-Noble.
And perhaps the biggest lover of them all is The Doctor himself, lover of a lot of loves. He loves his wife, and he loves his other wife. He loves a French mistress and a British nurse. He loves his companions – all of them, though with different kinds of love.
“I do know of rare, rare cases where a physician has unintentionally and unwittingly, over time, fallen in love with somebody,” says Bereza. “It was mutual, consensual and they went on to get married and have a family and be a pillar of the community.”
Rose holds so much importance to both the character of the Doctor and the DNA of the modern era show. Rose is the one who gave the Doctor the humanity lost in the Time War, taught him how to love, showed him to have compassion, and was the one who would ultimately help the Doctor out of his lowest point.
Even though she's clearly lost interest in him, Rose and Mickey put off breaking up properly until “Boom Town” at the end of the season, and even then, the uncomfortable feeling that Mickey doesn't belong anymore persists until he finally puts an end to it in “The Age Of Steel“, halfway through Series 2.
In fact, even though it was never officially stated during their time together aboard the TARDIS, the Tenth Doctor and Rose Tyler truly were boyfriend and girlfriend.
For Martha, Mickey would have become a person she could confide in, and someone that had the ability, knowledge and the experience to sympathise and support her as they adapted to life without the Doctor together.
River, who is a professor of archaeology and carries a TARDIS-colour/pattern diary of her adventures, is able to convince the Doctor of his future trust in her by whispering his real name into his ear, which he explains he would only divulge under rare circumstances.
She has just come from the Byzantium and meeting Amy for the first time. Amy is really struggling with killing Madame Kovarian and the Doctor's death, so River confesses that she knows that the Doctor is alive. Turns out when the Doctor leaned in and told her his name, he actually told her to look in his eye.
Since they are so alike, each pushes the other to potentially catastrophic actions. He later realizes from Ashildr that traveling together will only cause more harm than good, and prepares to wipe Clara's memories of him with a device. Clara tampers with the device so that it wipes the Doctor's memories of her instead.
