Being frens after break up?

It just comes across to my mind about being friends after break up... Can I do that?

uhmmm....

Me personally avoid to keep contact with ex. I mean... as much as I wanted to be friends.. but dunno why somehow I just can't do it.
But I think mostly men avoiding the friendship too after break up.. uhmm rite? dunno...

Anyways..
What about bumping into my ex? What will I do?

I decided to wash my car after I got bored off of blogging and sick of wondering abt this topic. Then as I stand in front of the lift, I saw the indicator the lift goes down to my level from level 18.
And suddenly I thot... uhmmm... how if I bump into my ex and my bestfr in the lift? I knw that she lives in level 18 and now my ex dating her. What should I do?? As the lift goes down one level after another, I can hear my heart beating hard.. ahahaha.. I'm so nervous on what to do...
I have to be brave and just say hi in cool mode..

Then the lift stops in level 10 (my level)...
Before the door opens...
I thout I have the guts to be brave. But nop, I run away to the corner and hide near the garbage room. I try to overhear if there is my ex's or my bestie's voice coming from the lift, .... wait.. and wait..... but so quiet.
Then suddenly my flatmate's bf comes out from my apt, he caught me hiding there.
He wonders " What are you doing there? "

I supposed to say "I'm hiding". But from what? From who? And why?

After all I realize that I cant deny myself... yep, I'm really hurt a lot and I'm just not ready to accept the fact that he's dating my bestfr...

Is it that bad? I mean the hurt? I'm in the learning process of letting go the past blessings.... Forgive and Forget.
I admit it's quite hard....
I think its a big NO NO being friends with ex.. nep...