awwww .. . . .. . . .that prob just means their in love with you ! plus the answers in the question THEY THINK OF U AS ANGEL ! =]
Angel del cielo
It means that you can be as kind as an angel/ good person. But once you get mad you can be mean or dangerous.
Del Angel is most likely Spanish in origin, meaning "of the angel". If it refers to a person name Angel, it means "of Angel".
This is a metaphor, not an idiom. They are comparing that person to an angel, which is a supremely good being in religious lore.
In dating, it just means they like you and want to see what your reaction might be. It usually means that you did them a favor or helped them in some way.
If he is saying that to a girl it usually mean you are beauty sent from heaven.
In French, you can say "Tu ressembles à un ange" to mean "You look like an angel."
It means that you save that person from any kind of problem and are very helpful to him or her. In short, It is an compliment.
The sentence "She is an angel of a girl" implies that she is a very good or kind person. On the other hand, "She is a girl of an angel" suggests that she is the daughter of an angel, which is more literal and fantastical.
You could say 'tsumetai tenshi,' which conceivably could mean either "could to the touch angel," or "coldhearted angel." It can be written: 冷たい天使
Moi angel
It means that you perceive yourself as a decent, moral and upright person.