What does frz mean on your necklace?

"FRZ" is likely a personal customization to your necklace, rather than a standard symbol with a fixed meaning. It is common to have jewelry personalized with initials or names, which makes the item more unique and sentimental to the owner. If the necklace was a gift, it is possible the giver chose "FRZ" to represent your initials, a nickname, or something special between you and the giver. Without additional context or knowledge of your personal background, it is difficult to provide a definitive answer to the meaning of "FRZ" on your necklace.