Why is it so hard to break up with someone

Some people are comfortable being the dumper while others are comfortable being the dumpee.  Sometimes it boils down to sex, while other times pure personality.

For me, pre sex, I am most likely to be the dumper. Post-sex though, there seem to be some irrational form of attachment we women feel, a false sense of intimacy which clouds ones judgement. Even if i find myself in a situation where i cry myself to sleep each night, i still find it so hard to let go.

And then comes communication. I am coming to realise that this is definitely not one of my strong points. Its almost like i am scared of feeling rejected so i don't speak up about what i want. 

I guess these are the motions in life.