Girlfriend

This is an extra sweet way to call your girlfriend. One of those special words used in relationship. And because bunnies are very cute and sweet she will like it specially when smiling at her in the morning

Love is a very powerful and sweet nickname but Lover girl is more private. Use it for the real girlfriend as a sweet playful nickname or if you just dating use it as endearment to show your affection

Person with a kind heart can be called a sweetheart. A stranger can call you sweetheart if he does not know your real name but it is very common between friends or couples. Sounds cute and friendly