What is the ruling regarding a girl returning to a young man whom she rejected due to his past, despite her fear that his repentance is not sincere or that he might lead her away from the religion, and despite her desire for his guidance?

Decisions should not be based on dreams, but on facts. One must be wary of excessive doubt and fear of the unknown, and believe the suitor in his repentance, the signs of which have appeared truthful. He is not obliged to disclose his past. One should not doubt people's repentance and have ill thoughts of them, for a Muslim is judged by what is apparent. What matters is the suitor's current state, not what he was. One should strive to marry a person of good character and religious commitment, and let the fear of relapse be a motivation for steadfastness and helping the husband obey Allah. No one is infallible from temptation, and excessive self-confidence can lead to arrogance. Be honest with your family about your change of mind regarding the rejection, and ask them to verify the suitor's condition and uprightness. The criterion for choice is his religious commitment, character, and suitability as a husband. It is not permissible to speak with the suitor via social media before marriage. If the matter does not proceed, learn from what happened and persist in prayer.