It is either an opportunity or an obstacle depending on what the OP wants?
If he wants to get back with her, then it is an opportunity to show that he can stand on his own two feet, take charge of his life, be confident, be happy - The qualities he needs for either moving on or getting the ex back are fairly similar, so mentally, he can accept it is over and start rebuilding his life, the ex will see this and if she takes him back or does not, either way he is moving in the right direction.
If he truly does not want her back, then really, hmmm, better to separate i think?