Realize

"Realize" is the second single from American singer-songwriter Colbie Caillat's debut album, Coco (2007). The song is the follow-up to her worldwide debut hit "Bubbly", and was officially released in January 2008, peaking at number 20 on the Billboard Hot 100 chart, becoming her second Top 20 hit in the U.S.

The song is musically similar to "Bubbly", as it is an acoustic folk-pop song, where Caillat sings of having feelings for a best friend.

Source: Wikipedia