Expansion of A, B, C, D, E

BOY: A, B, C
GIRL: What?
BOY: Always Be Careful
GIRL: Ahan then?
BOY: D, E, F, G
Girl : ??
BOY: Don't Ever ForGet That
GIRL: Hmmm...
BOY: I'm H I
Girl: What H I ?
BOY: Happily In love
GIRL: So ??
BOY: J, K, L, M, - Just Keep Loving Me
GIRL: And how about N, O,P, Q, R,S, T, U, V, W, X, Y, Z?

BOY: No Other Person Quite, Reasonable, Shall Treat U Very Well Xcept me You'll Zee♥♥♥..