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.
Ignite is a verb that means to start heat or a flame. Trying to ignite a match inside a dark fireworks factory is a really bad idea â one that can get you blown sky high. The literal definition of ignite is to cause something to catch fire or burn. Dousing a house in gasoline and putting a lit match to the front door will surely cause the home to ignite. In its more figurative sense, ignite means to inspire intense feelings.