Informal:
* "Désolé mon amour" - This is the most common and direct way to say "sorry love" in a casual setting.
* "Pardon mon amour" - This is similar to "désolé" but slightly more formal.
* "Excuse-moi mon amour" - This is a more polite way to say sorry, but it's still informal.
Formal:
* "Je suis désolé, mon amour" - This is a more formal way to say sorry, and it's appropriate for situations where you need to be more respectful.
* "Je vous prie de m'excuser, mon amour" - This is the most formal way to say sorry, and it's best used in very formal situations.
Other options:
* "Je suis désolé, ma chérie" - This means "I'm sorry, my darling".
* "Je suis désolé, mon trésor" - This means "I'm sorry, my treasure".
Important Note: It's important to choose the right expression depending on the context and the person you are talking to.