Search Results: emotional cheating

So as I browse threw posts on here I tend to ignore some things from time to time. I consider myself to be an old soul and find I tend to feel differently then the masses on many topics. I also find that I will take the side of a debate that no one else seems to be taking even if I don't agree with that side of the argument just to spark healthy intellectual conversation and many dig out some deeper perspective.
That said I came across a post today and yesterday in which the poster referred to emotional cheating. Maybe it is one of the reasons listed prior but as I read this I felt as though I was in the twilight zone or something. I personally believe that the act of cheating requires an actual act. A persons thoughts are their own private property and we should be free to think however we wish about whatever we wish. I have many times in my life thought about something and never acted on the thought. I am currently on a diet trying to lose a few pounds. Just yesterday I was at the store shopping for vegetables and passed by the ice cream isle and thought to myself "man I would run a train on that chunky chocolate chip ice cream, om nom nom nom." I then walked the rest of the isle grabbed my carrots and sweet potatoes and proceeded to the cash register and left.
So my question is this; Did I just cheat on my diet by thinking of the oh so sweet ice cream and the dirty things I would do to it if I had it in my life? Does this mean that if in a relationship I can not think that the cashier at the store has brilliant blue eyes (like crystal blue) without violating my relationship with my partner? Should we be punished when no crime has been committed just for thinking about it?

1. Emotional cheating: creating a strong bond with another person amd caring about them way more than about relationship: spending more time, more dedication, will to relate to another person. Almost or complete erosion of first relationship.
2. Physical cheating: sex or any act with another person while beimg in a classical relationship. Done out of any reason, definitely crossing the agreement with significant other.
Which one would hurt you, being cheated on, more? Is any of them survivable for the relationship?