Im Not Like You

I remember the first day
I saw your face
It was kindergarten.
Now, 7 years later past
Not much has changed,
Your still your same old self,
But it was I that changed
Going behind your back,
But I do remember all the great times
Sleepovers,
Town,
starbucks,
And more,
But when I try to be your friend
All you do is walk way in shame
What is the supposed to be?
A hint, or a clue
That I am not like you.