If you look at her closely

you can see that

Every now and then

She turns away from her group of friends

her smile falters

And she becomes another person for a few seconds;

A sad person,

A person who is broken and damaged,

And after a few depressing seconds,

She goes back to the group.

Smiling and joking around

She almost looks like she is actually happy.

But if you look at her closely

You can see how spurious her smile really is

And you can see all the wreckage behind her fake smile