The concept of "you" and "me" can be confusing for a child. Like recently:
Elyssa : Afterwards, mummy read to YOU ok?
Me : Should say read to ME.
Elyssa : Ok. Afterwards, mummy read to ME.
Me : *smile*
Then, after her bedtime story:
Me : Good night my little princess. I love YOU.
Elyssa : Good night! I love ME !!!