It is possible that really did not feel about the situation.
When I am hurt by other people's actions I tend to put a lot more time on what happened then I really should. I look at each individual scenario and see how I was mistreated. A lot of the time I was mistreated, but often I am the one going over it in my mind, replaying what has happened and how the person wronged me. Often this amount to of brain power that expend on what happened is not really worth. I assumed that the person that offended me moved on without much of a blink of an eye.
Another thought about guy paying attention to the other women, although it is really rude, and inconsiderate to do, he already knew how you felt about him and figured he might have a shot with the other women...shows he cares not a wit about others and only about himself.
I am always on the look out for good anime. PM me any good titles, The Death Note and Ghost in A Shell are the kind that I am into, but would consider others with really good writing.