Lack of communication could be a big factor. If we don't talk about our feelings, hopes, and fears, misunderstandings can grow and eventually break what could have been a great love. For example, if one person thought the relationship was moving too fast while the other thought it was just right, but they never discussed it.
Start with honest communication. Sit down and talk about what went wrong and what you both still want from the relationship. Just be open and listen to each other.
It could mean that in the style of 'Pulp Fiction', they'll proceed slowly. 'Pulp Fiction' has a certain rhythm, and this line might suggest following that rhythm in whatever they are doing.
In 'Pulp Fiction', this could imply that the characters are going to approach a situation in a calm and unhurried way. Maybe they are about to do something dangerous or complex and they don't want to rush into it.
Well, it really depends on the Christmas story. If it's a really sad one about someone being alone during Christmas or something tragic, then maybe. But generally, most Christmas stories are positive and full of hope, so I probably won't cry.