Dear kkay,
your friend needs you now more than ever, breaking up with someone you love is like a death in the family, so I guess you could say she is kind of grieving, keep being her friend and try to visit her often. Maybe she can come stay with you for a while until she is back on her feet ? While this is not always possible, try to remain strong for her as she obviously is not. It may not be a better guy she needs right now but more so a friend, and you are that someone. She is probably going to need a few things to keep her mind off him and learn to appreciate the good things in life again, try and have some quiet nights in watching videos, eating pizza, have some slumber parties, just you and her. If she seems as though she is ok with others around, maybe you could invite some other friends round aswell (male and female) so that she is at least socializing again.
Good luck,
.::suzy::.