I am just a note
I am all alone
I need a friend
Where is my friend?
 
I am a note (I'm another note)
I have a friend (You are not alone)
We're singing in
Harmony
 
We are friends (You have a friend) (What's up guys?)
We're singing in (You are not alone) (I got here late)
(in) Harmony

Corrections? Let me know.