1) The document is lyrics to the song "Angel" by Shaggy, describing his love and appreciation for his "angel" who has been by his side through difficult times.
2) He acknowledges she has not received the love she deserves but that his feelings for her are strong after being together so long.
3) The chorus repeats that she is his "angel" and "darling angel" who is closer than friends and will be there for him when he needs support.