How to help a friend through a break up?

first i wish my level is 2 so i can vote to Zach,now let me say this,i think the problem is from you're girlfriend side ,its not about if they are perfect to each others or they spend long time as a boy and girlfriend,its about she know hem very well,but she is not sure about her feeling and if she really want to complete with hem,if you asking me i well say its better to leave hem because love is something serous if we are not completely sure if the partner not exactly what we want then we sued end it,because its the best way and its much better we end it after we have kids and family,mostly she don't like something about hem something like bad habit or bad thing in his personality,its may be small things but if you gather all the small bad thing in hem its well be something really cant live with it for the rest of you're live ( trust me the tiny small things in any relationship its the most important thing to make it work out ),i think break up is the best choice sense she is not sure abut hem,another answer i can advice you is let them booth have a break to be with a different guy and girl,not something serous but just as dating for few weeks so comparing to another guy she can be more sure if he is the right choice to her.