the only way he is ever going to get closure is to learn to accept what and why she did what she did... was it his fault? was it her fault?
if if it his fault, is it something that he can put right. if its her fault then why did she do what she did, was it important to her, to her family.. etc etc?
the only way of being over someone is to accept it and move on to newer and better things.
my friend broke up with his gf after 5 years of a relationship, then they remained broken up for 2 years but got married to each other after 2 years of being apart because they worked their differences out and were happy with each other.... nothing is final and concrete except death! remind him of that... everything and anything can change at any time.