I have a 16 year old coworker who admitted she was in love with me
What is so special about you?
Because she thinks I'm handsome and cool
That is funny.  I know you know this, but you can't date anyone underage.  It is wrong.
Why? I'm attractive. How come she can't see in me?
You are the adult here though. You are going to get into trouble if you have relations with someone that is underage.