What should a girl do about a young man who is threatening to commit suicide and harm her if she does not marry him, knowing his bad behavior and that another young man has proposed to her?

The girl must repent from the forbidden relationship and cut ties with the young man. She should not accept his marriage proposal due to his immorality, his consumption of intoxicants and drugs, and his threats of suicide. She should not be concerned by his suicide threats. If someone whose religiosity and character she approves of proposes to her, she should accept him. She must inform her family about his threats so they can deal with him firmly, and she can inform the authorities if necessary.