10 years is a lot to throw down the drain. If you thought it was a good relationship, despite minor problems that all relationships have, then Id encourage her to give her man one more shot, or at least try to work it out. Even if someone cheated or messed up real bad, I would feel better trying to save the relationship and forgive them while you can. She may hold a grudge now, but sooner or later shell wish that she wouldve stayed around a little longer. But if this was a one way relationship or hes absolutely done with her, then Id just encourage her to not jump into a relationship but instead get to know other guys. If she doesnt give herself time to greive right now, then shell never really get over it. Make sure that she thinks things through, and doesnt end up with any regrets. If you know she loves her ex, then dont try telling her what an azz he is, but instead just listen and try to understand why she feels the way she does.