Be My Forever by Christina Perri is in Bb at 152 beats per minute and runs 2:41 across 90 bars. It uses 8 chords — F, C, Bb, Gm, Am, Dm, Fmaj7, F6. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? Be My Forever guitar melody tab.