There has to be a clarity when you post a query.if your friend is not clear how and why she is feeling in a certain way she should breakdown her thoughts and try to figure out what Is bothering her the most,as per priority she should find the solutions to the problems that are under her control rest she has to accept and move on.she can journal her feelings if she Is not expressive while talking. For closure she has to accept the situation around her. She can talk to any trust worthy friends or relatives who is unbiased and not judgemental,or else she should seek professional help.

Ask your friend to consult a clinical psychologist. After evaluation they will advise your friend how to deal with it.

Let your friend seek a professional support to overcome this issue.. She should be abke to get some clarities and understanding and some guidance to handle it appropriately. Let her  Consult a psychological Counselor for a therapy..