This all depends.

Take for instance a girl you loved more than anything in the world...could you still be friends with her after you split up? Especially if you didnt want the break up? I couldnt.

Girls get even more emotionally attached to guys they love, even if they break up they will still let the old feelings take over & allow themselves to be used by their "love" months & years down the line (ive seen it)... whereas guys, once hurt, will (mostly) say "fuck off bitch you messed me around so fuck off"

What im saying is, the way us guys feel about ex's etc, girls feel it more (jealousy) i think some of you have literally already said this here, ive just said it differently.