Let her know that you are there for her whenever she needs someone. She may not come to you but as long as she knows she has a friend in you this will make things easier I think. Include her in your activities and make her feel special by making her dinner, sending her cards or whatever just to show that you care about her and know what she's going through.

All this will take time. And the recovery process is gonna be really hard for both of you. Support her as much as possible. Call her out of the blue just to say hi and to check on her...stuff like that will help.

I hope this will help you out some.