Meaning of "I'm Waking Up to Us" by Belle And Sebastian

The lyrics of "I'm Waking Up to Us" by Belle And Sebastian paint a picture of a failed relationship where one person is left longing for the other who has moved on. The singer acknowledges their flaws and the mistakes that were made in the past, expressing a sense of regret for not being able to make things work. The reference to the other person being with someone who "takes the prize for everything I ever showed her" emphasizes the feeling of being replaced and not measuring up to the new person in the other's life. Despite the bitterness felt towards the situation, there is also a sense of acceptance and a shift towards feelings of pity and love, showing growth and maturity in dealing with the pain of heartbreak.