Formal:
* Mon ange: This is the most common and straightforward translation.
* Mon ange gardien: This translates to "My guardian angel" and implies a more spiritual or protective sense.
Informal:
* Mon petit ange: This is a more affectionate way to say "My angel" and is often used for children or loved ones.
* Mon amour: This translates to "My love" and can be used as a term of endearment for a romantic partner.
Other possibilities:
* L'ange de ma vie: This translates to "The angel of my life" and adds a touch of poetry.
* Ma lumière: This translates to "My light" and implies a spiritual or guiding presence.
The best option will depend on the specific situation and the tone you want to convey.