Hallo, Mei Lin.
I like you, I will take you as my god-daughter.
Let uncle Meat Pao talk abit about your problem.
Since you are born in 1986, I calculate with my calculator which
say you are roughly 20 years old now. Is that correct?
Since you are 20 years old, of course you are still playful, want
to laugh with your friends. That is normal.
Dont be overwhelmed when you see serious faces. They put serious
faces because they are doing serious things and want to be
professional. Just try to concentrate on work. You can chit chat
with your colleagues during lulls, or talk to guys, or also chit
chat during lunch.
Try have a social life outside your work. Since you work late
hours, then you must maximize your weekends.
Also I notice you say you are overworked. See if you can make any
efficiencies. Observe your work flows and work process and try to
improve efficiency. This can range from saving time photocopying,
or prioritizing, or breaking up similar tasks.
Cheers.
Uncle Meat Pao.