SO THAT´S THE THING

Girl meets boy, boy meets girl. Girl falls madly in love with the boy, boy couldn´t care lass. Girl hertbroken gives up. Girl is indiferent wih the boy, boy get scared and try to win her back, boy falls madly in love with the girl.
The other way around may happen too.

Analyzing several friend's relationship I´ve fond out that this happens a lot. I wonder why.....