Let your Husband buy you new flowers!
You have had to save these for 5 years... plus because he does not buy you flowers.... tell him you need NEW ones!
Usually flowers are pressed, when still fresher. If you smash them in a book or picture frame now, it might be too brittle, and the flowers will break apart.
Or, go to a frame shop, and have them put it in one of those display box, frames... the kind for souvenirs etc.
If you go to a craft store... they have floral sprays, that you spray on it... to help preserve the flowers.... or maybe a florist has it too.
Its for dried arrangements...