Can God answer a young man's prayer that the girl who rejected him not marry someone else?

There is no sin upon a woman for refusing to marry someone she is not comfortable with, although it is preferable to be keen on a man of good character and religious commitment. As for the rejected suitor’s prayer that the girl will not marry anyone else, this is an act of injustice and aggression, and injustice is a reason for prayers not to be answered. It is recommended to frequently recite the adhkar (remembrances) for morning and evening, to maintain obedience to Allah, avoid His disobedience, and be cautious of speaking with non-mahram men. Whoever wishes to marry should approach houses through their doors and propose to the girl’s family.