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I believe that I can help.
First time breakups (I assume this is a first) are very hard, but they are a part of life. She is suffering a form of grief, but it is not from the death of a loved one or close family member.
Grief and loss are very tough but they are part of life and she cannot avoid the realities of the human condition, and you cannot protect her.
She is suffering not only the loss of this boyfriend, but a loss in social position.
Most people best get over losses by enduring them and not taking medication.
Your daughter seems particularly sensitive, and it is disrupting her work and her family life.
It this case, it may be prudent for her to see her family physician and tell him or her about her extreme reaction to this loss, in the hope that the physician will give her a short-term dose of anti-anxiety medication which will help get her on her feet and back to work.
She will grow stronger from this in the end, and is fortunate to have her family behind her.
She will move past this, prosper, and find someone more suitable for her.
I have a great book for you to get her. It has helped many of my clients:
She is not alone to suffer this and will not be alone to come out healed and stronger than ever on the other side.
I shall keep her, and all of you family in my prayers.
Elliott, MAE, LPCC, NCC, CCMHC