Is this a good thing to say,

to this one girl at work that I like? Even though she got more social skills than me...And seems like she could make friends better than me. And is more outgoing than me.

What if I said, ' so, you're pretty thin huh?'

By the way, one thing I wouldn't say would be,  'so, you're pretty good lookin' huh?'

I wouldn't say that, unless I wanted to get a restraining order.  Against me , that is.