how should I tell him?

For awhile now I've felt like I'm a little. I need attention from my boyfriend, I love cuddling, and i quite frequently get into this state around him that's childlike. He calls me names like pumpkin, baby, baby girl, little girl, etc all the time but I only call him daddy when we do dirty stuff because I'm not sure how he'd feel about me saying it casually.

He's very dominate in our relationship but nurturing and caring and I'm the submissive one. I'm just not sure how i should bring it up to him that I think I'm a little. I need some advice

UPDATE: So it was brought up in conversation yesterday that he doesn't care what I call him, whether that's daddy or whatever as long as it's just him and he said it doesn't bother him at all. Progress!!