I think it depends on particular boy or girls behaviour/character..all people cant be on same attitude.. .belief should stay stronger between them..

But my opinion is that in their love if any problem arise between them and leads to break up..then,a girl can easily forget everything of thier past love memories and can lead the life happily..while that a boy cant..for a boy it takes a lifetime to forget his lover..

                  this is just my opinion..if anyone wish can share your opinion here or in skype..my skype id:: M.N.R.V SWAMY