I think a guy likes a girl and he ask her out and she says no and she realizes she does like him as it shows in the lines "Can we bring yesterday back around, Cause I know how I feel about you now" and he is sad/upset about it which applies to the line "I've let you down"
I think a guy likes a girl and he ask her out and she says no and she realizes she does like him as it shows in the lines "Can we bring yesterday back around, Cause I know how I feel about you now" and he is sad/upset about it which applies to the line "I've let you down"