Lost control

Today my emotions lose control again.
I laugh until my tears fall down.
Actually the thing is not funny at all.
But don’t know why I just cant control myself.
I keep laughing non-stop.
Act like an idiot.
Firstly is because CHIN CHUEN then WOO TUNG.
Their action makes me keep laughing.
Just some mistake (lame job) they had makes.
In the morning I still ok… (seem to be OK!)
But nearly after school, I cant stand anymore.
When I was laughing, I am not happy.
I feel the sadness…
I just cant stop myself…
PLEASE, Help me.