Or the song is about a girl who is totally pushed around or unpopular("a giver") who falls in love( "for this request I'll fall in love with you") with a boy for his noble deeds/personality/kindness, but he cannot and will not feel the same for her("But you could not love me") because he is out of her leauge or is already in love (..."because I am just a giver and she could be your queen.")
Or the song is about a girl who is totally pushed around or unpopular("a giver") who falls in love( "for this request I'll fall in love with you") with a boy for his noble deeds/personality/kindness, but he cannot and will not feel the same for her("But you could not love me") because he is out of her leauge or is already in love (..."because I am just a giver and she could be your queen.")