 " Dangerously in Love 2 " is a moderate R & B , soul and quiet storm ballad pacing in medium time . It was written in the key of F major , and moves at a moderate tempo set at 100 beats per minute . Vocal elements of the song range from E3 to D5 . " Dangerously in Love " is backed by piano and thumping drum instrumentation . Many music critics noted it to be musically similar to the original Destiny 's child version . Lyrically , the song is about being romantically obsessed , as indicated in the chorus : " I am in love with you / You set me free / I can 't do this thing called life without you here with me " . According to Lisa Verrico of The Times , " Dangerously in Love 2 " bears resemblance to Janet Jackson 's work if viewed from a " flirty " perspective . 
