Well, if u want something cute, u could tell him "TE AMO"(I LOVE U), or maybe, "ERES TODO PARA MI"(U R EVERYTHING FOR ME).
if you want to teach him how to ask for food, or for some kind of thing u should teach him "QUIERO COMER PIZZA" (I WANT TO EAT PIZZA), "QUIERO IR A TU CASA "(I WANT TO TO GO YOUR HOME), etc
all depends in what you want to say...
please mail me and i will help you better email@example.com, ill answer as fast as i can
Me! Im form México and i used to live in NZ!!