I long to belong to someone... dominant, aggressive, and somewhat sadistic and arrogant
I fell as if that will make me feel 'whole'

What do you define as "ill" do you desire a life goal outside of the regular norm (what ever that is) yes. Do you need treatment? No, if your life style does not harm or hurt anyone else.

There are many people who want to be controlled and many who want to control. Just finding that special someone is the issue