My cat has made this high pitched noise ever since he was a kitten? It sounds like hes happy about something?

Question

Its like almost a meow but isnt and its high pitched

he does it when hes happy

what is it?

Answer 1

He is talking to you.  My cat is Siamese, he doesn't really meow, he kind of makes talking noises.  

Answer 2

Animals have different vocalizations for different reasons.  My Maine Coon "chirps" when it's feeding time - and my Russian Blue "chitters" when he see a bird or squirrel outside when he sits in the window.  Most Maines can't meow per se - they make chirpy sounds or like a mini Chubakka....so it may be the breed as well.