my coworker A(male) often makes my coworker B(female) laugh, when she (coworker b) laughs she always move her face towards me and makes short eye contact while still laughing.

We sit like this

Coworker A(make) | her | me

I'm little confused why does she do like this?

I try to make little talks with her but I am usually nervous and aloof.

How should I process guys?