Experience.

Are we still friends?

All i ever wanted was to see you being happy.
You frown, i frown. How am i going to be cheerful when you're sad?

Tell me, since when did i stop being cheerful to you when you were still with him?
I just want to see you smile, and smile to Koala, will you?

But, are we still friends?

You have only 1 more month to see Koala in wwss though. When are we eating together? Remember?
When are you going to sit at the canteen with koala and see him eat a lot a lot?

Please stay cheerful, Mouse. Koala is always here for Mouse.
I can't get used with you giving Koala cold shoulder. :(