Lyric discussion by crail 

Cover art for you versus the sea lyrics by Daphne Loves Derby

Could be about his mother. Through the hardest times she still fought to keep her "Home" whatever you may want that to be, a real house or comfort zone. I feel that it could be a pun. She tries to tell him that everything is fine, but he sees through that and doesn't know why she puts up with it.

The dream scene: i interpretted it being that she was suffering but didn't want him to know even though he saw through the guise. He tried to help but she refused or "walked away"

Perhaps his mother was trying her best to create that perfect world for him.