It’s your first year Prim. Your name’s only been in there once, they’re not gonna pick you.
Oh I want to add something to that commentary about Moffat's treatment of Ten. Remember in School Reunion, it was actually the Doctor who said yes to bringing Mickey along with them. Rose was adamant in not bringing him along, well, it was obvious she didn't want to. AND THEN, in GitF, Rose comments that the Doctor can't keep the horse, then he says that he let her keep Mickey. I don't know if that makes sense but yeah.