I like boundaries also. I think that this is due to the complete lack of boundaries in my family when I was growing up. Boundaries allow me to protect my personal space and privacy.
Havng said that, Almeda, I have also crossed boundaries like you have, in the workplace. I like it when my boss likes me and I always try to be friendly but I don't want that friendship to go beyond the workplace. I always liked keeping home and work life separate. (That's another whole issue altogether having to do with shame...Yikes).