Deafblind people communicate in many different ways determined by the nature of their condition, the age of onset, and what resources are available to them. For example, someone who grew up deaf and experienced vision loss later in life is likely to use a sign language (in a visually modified or tactile form).
To burn someone's bridges is too forget about them. Ryan built bridges, meaning he still might want to come back to her. He is telling her to burn them, because he can't seem to do it himself. It isn't easy for him to forget her, and hes asking for her help.
The Burning Platform. The term: Burning Platform is a business lexicon that emphasizes immediate and radical change due to dire circumstances. The origin of if the term comes from a story about a man on an oil platform in the North Sea. One night he is awakened by an explosion and resulting fire on the platform.