Inman and Ada from Cold Moumtain
Because they hardly knew eachother yet he came back to her.
Ennis and Jack from Brokeback Mountain. Does it really need explaining?
Elizabeth and Darcy from Pride and Prejudice, because I love the love/hate relationships.
Cady and Aaron from Mean Girls, because they are so cute!
Edit: OMG. I forgot Jo and Laurie from Little Women!