What's a cute nickname for my boyfriend?

Okay well he calls me Miss Mel (Mel's my name) and It's really cute but I just feel a little weird just calling him by his real name, Kieran, when he has such a cute nickname for me! He's really really tall (we're 8th graders and he's 6.3) has blond hair, and... well... yeah:) any help would be appreciated thanks:)