I miss u - enikk ninne nashtapedunnu (we usually use "i miss u" during chats,so i think u don't have u to use it in chatting)
I hate u - ninne njan verukunnu.
I want to eat - Eniku vishakkunnu.
I'm sleepy - Eniku urakkam varunnu.

I miss u - njan ninne miss cheyunnu.
I hate u - Njan ninne verukunnu.
I want to eat - Eniku kazhikanam.
I'm sleepy - Eniku urakkam varunnu.

I - Njan

You - Nee, Ningal, Thangal

Eat - Kazhikkuka
Sleep - Uranguka
hate - verukkuka

I hope it helps :)