My girlfriend's doctor prescribed her an anti-depressant.
Do you think the anti-depressant will help her depression?
I'm not sure, she's really in a deep depression.
Aren't you proud of her for going to the doctor for this? She's struggling and finally got help and won't be a victim to her illness. With medication and therapy, she could be on the path to recovery.
I hope so, I may have to leave her if it doesn't work,
Try to support her and give her some time to adapt to the medication. It may take time to be effective and she will need your love and support while she adjusting and working out of her depression.