Meaning of "I Know U Know" by Basshunter

The lyrics of the song "I Know U Know" by Basshunter speak about the recognition of the end of a relationship that once brought happiness but has now faded. The speaker acknowledges that it's time to let go and move on, even though memories of the good times shared still linger. The repetition of "I know you know" emphasizes the mutual understanding between both parties that the love they once had has reached its end. The imagery of sunshine in their lives symbolizes the happiness of the past that must now be left behind. The song conveys a message of acceptance, closure, and the bittersweet nature of moving on from a once cherished relationship.