You shouldn't assume that someone is interested in you romantically
Leslie has been gettting along very well with her new coworker, Ben.
Leslie wants to be closer to Ben.
Leslie keeps things platonic with Ben.
Thinking there's a romance blooming, Leslie walks up to Ben and asks him on a date.
Leslie's relationship with Ben grows, and they have a harmonious relationship at work.
Ben tells Leslie he is married, and Leslie is thoroughly embarrassed.