it goes E, F, F, F, F, E, E, F, F, F, B, E, F, F, F, F, E, E, F, F, F, F... it goes like that because it's really repetitive and that's sort of all I know...
It is about a relationship she had with a boy that doesn't work out to be forever. She names all the things they did together and how fun the relationship was and how sad she is now.
It means nothing. Her and her boyfriend in the video decide to get matching tattoos to say that they will be together forever. So they are matching. Until he dies and they are no longer matching....