I would have preferred a neutral option of no one, because a soul mate could be you yourself. Or may not feel like having one. There are many things one wont discuss with spouse/lover and many many things that may not be discussed with friends. So, the mere fact that some things are not left in the dark side means that both spouse and friend have limited accessibility to inner thoughts of an individual. More over the one's thoughts can be colored to suit that of a friend or spouse for the fear of alienating them. So given these things, I would have preferred a "No one" but since that is not there voted for lover.
Every dog has its day. Today is my day.