Its clearly just human nature!

Let me explain!

When a relationship breaks down one person always feels rejected

Humans like to be liked and love to be loved,

So when a relationship breaks down WE question OUR choice/s of partner and rather than be rejected, we reject until someone makes you feel safe enough to feel love again,

As a defence in the 'rejected - love' stage we repel the opposite sex as a sort of safeguard so as we cannot feel anymore pain and we can 'heal',

Thinking about it the way some people act when been approached by someone who fancies them probably helps them 'heal' and prepare them for love again! Not nice if its you approaching someone though, but not as bad as rejection from someone you love Hmmm!!!

But Like I say it's human nature/animal instinct.

Don't get upset if someone just don't fancy you back we all meet someone worthy.....eventually.