The song "ROS" by Mac Miller is a love song that explores the ups and downs of being in a relationship. In the first verse, the singer describes his attraction to his love interest and the pain and confusion he feels about their relationship. He's still searching for her and is experiencing mixed emotions about the relationship.

In the second part, the singer expresses his adoration for his love interest, describing her as "perfect" and speaking about their adventures. He expresses his desire to give her all of his love and to make the relationship last. He also acknowledges his own flaws and confesses his obsession with his love interest.

The chorus of the song emphasizes the sweetness of their love, but also acknowledges that nothing lasts forever. The outro repeats the singer's desire for his love interest's love, through all of life's challenges.

Overall, "ROS" is a song about the complex nature of love and relationships, and the power that love has over people. Mac Miller's lyrics explore both the joy and pain that come with love, and the lengths that people will go to hold onto it.