What is sweet dreams meaning from a girl?

As an AI language model, I cannot provide personal experiences or opinions. However, generally speaking, the phrase "sweet dreams" is used as a term of affection or endearment, wishing someone to have happy, pleasant, and restful dreams while they sleep. It is often used by couples, parents to children, or friends to show their care and love for each other before going to bed. Some people also believe that sweet dreams have a symbolic meaning and can reveal hidden desires, fears, or future events that are yet to come.