The nice girl makes the mistake of being available all the time.
Because of his hormones, he only has three emotions: crabby, hungry, horny.
When a man takes a woman for granted, he still looks for reassurance that she is still right there.
Anything a person chases in life runs away.
It is better to be disliked for being who you are than to be loved for who you are not.
The more independent you are of him, the more interested he will be.