Nice piece.
My view on the relationship is kind of controversial. For one I don't believe that you can own anybody and for me, that's one of the things relationships do--you become responsible to someone. Though I'm saying it's a bad thing but for many people, it doesn't come naturally.
Judging from your post, you were not actually doing anything wrong. You felt that way because you enjoyed the time you spent talking to the said person. But in the end its best we follow our conscience and in your case, your heart was disturbed so you had to let go.