To make it easier, I'm just gonna explain the story. This is a Doctor Who fan Fic featuring the 8th Doctor near the end of his life. (All you need to know that my MC is a grumpy old man in the body of a young one.) He meets a girl called Valerie and although he tries to protect her from an infection, he isn't very nice about to her about it. In fact, he's not very nice to anyone really. At the end, Valerie joins the Doctor for a journey around the universe. Although he is still horrible at the end of this story, he mellows near the end of the 'series'. But why would Valerie accept his invitation to travel the universe with him when he's down right horrible to her?