Because you've anchored yourself in the past .. instead of moving forward.
Don't think of a breakup as the end to something .. rather your chance for a new beginning.
Find your own personal happiness. Relationships can come and go in your life .. but your own peace and contentment is what's going to get you through.
well i can't answer that coz i've the same question for myself..
Try and move on... No matter how hard. You can always do it! Hurts for a wile but promice it gets better.
It's fun short term