Structure for opening sequence

The opening sequence for my film is the newest addition and I hope that I can finish it in the small amount of time remaining, the best thing about a montage is that it can stretch out through a numerous amount of locations and time periods without confusing the audience. Because of the recent weather, with a dramatic increase in snow, I thought that filming would be near impossible because it would be an error in continuity, but the montage idea for an opening sequence means that i can film in the snow to create the illusion that the narrative within it happened before the film, which is not snowing.
The montage needs to have some aspects which show the audience what i happening clearly, such as:

• Fade in
• Allowing the audience to know the relationship started off happy, shown by the two holding hands and  walking together
• Showing closeness between the two, sat together, laughing, watching TV.
• The separation between them growing, sitting further away from one and other
• The faces of the two not being shown as happy anymore, or at least not the female's
• The two walking further apart from one and other
• The girl walking up to the boy, handing him a note, and walking away leaving the boy.
• The boys face as he reads the letter looking upset.
• Fade out