I don't own Sherlock or Doctor Who, although I would love it if I did.
Sherlock lays in bed for hours until curiosity over takes him and he slips out of his room. He goes to the only room that he knows, the control room from there he sees halls and runs into it.
He wanders around for along while glancing into rooms full of relics, or kitchens, or vacant bedrooms, he see many unmade beds, which leads him to wonder what happened to the other people who traveled with the doctor? Sherlock eventually gets to the library, and he is amazed, there is more books there than he could have imagined.
He walks around for a while and is just pulling out a copy of a book he has never read called The Hunger Games when a voice behind him asks "couldn't sleep?" And shocks him causing him to drop the book, Sherlock turns around tense and nervous, but is immediately calmed to see that the voice was just Amelia-Rose.
"No," Sherlock answers.
"It's amazing isn't it? The TARDIS, I mean." Amelia-Rose asks him. "The TARDIS?" Sherlock asks
"Oh, my dad didn't explain, the ship we are in is called the TARDIS, short for time and relative dimension in space." She tells him
"It is interesting." He agrees.
"I've lived here my whole life, and still when I come down here to library, or the observatory, or the pool, I am filled with wonder." She exclaims full of of joy.
"The pool?" Sherlock inquires
"Ya!" Amelia-Rose yells, "do you want to go swimming?" "Now?" Sherlock asks. "Why not?" "I don't have a suit." He tells her. "Then lets go get you one." She says leading him to one of the many closets and grabbing him a suit, Sherlock dresses and she leads him to the pool. "Race you in!" Amelia-Rose sings braking into a run, or at least it sounds like a song to Sherlock who runs with her as her golden hair flows behind her and her emerald eyes twinkle. They splash into the water as if they where synchronised, and Amelia-Rose bursts out laughing, Sherlock realizes how different they are she is as old as him, but never grew up, and Sherlock was forced to grow up too fast. Suddenly Amelia-Rose kisses him straight on the lips, and quickly pulls away, "I'm sorry." She says blushing.
"No, it's fine." Sherlock responds unsure of him self, he is 20 years old but has never had friends or a girlfriend, he doesn't know how to act or what to say. The 2 spend the rest of the night swimming and falling in love for their first time, from that night on they are inseparable.