I interpret this song as being about person A, the singer giving person B one last chance to tell them that they love them.
If B doesn't give at least one sign tonight that they like A, then tomorrow, A is going to find someone new.
A has been confused and blind lately because they don't know if B likes them or not.
I don't find A's ultimatum very romantic: "Tell me you love me at least once, or else tomorrow I am gone." I feel A is being demanding and controlling.
I interpret this song as being about person A, the singer giving person B one last chance to tell them that they love them. If B doesn't give at least one sign tonight that they like A, then tomorrow, A is going to find someone new. A has been confused and blind lately because they don't know if B likes them or not. I don't find A's ultimatum very romantic: "Tell me you love me at least once, or else tomorrow I am gone." I feel A is being demanding and controlling.