Will Allah take the right of the wronged from a girl who abandoned him after love, devotion, and an intention to marry her, or will He postpone her reckoning until the Day of Judgment, and will Allah reward him with good if he forgives her, even though the relationship between them was built upon haram?

Acquaintance, love affairs, and infatuation between young men and women, even if for the purpose of marriage, are a door to temptation (fitna) and a means to evil and corruption. If a man's heart becomes attached to a non-mahram woman, he is not permitted to exchange words or correspond with her. The lawful way is to approach her family to propose marriage if he is capable. If marriage is not feasible, then both of them must turn away from this attachment and strive to maintain chastity through marriage and occupy their time with what is beneficial. These relationships are forbidden. Her speaking to another young man, just like your speaking to her, both are unlawful and transgress the boundaries of Allah. You must repent from these relationships, adhere to the boundaries of Allah, and occupy yourself with what is beneficial and draws you closer to Allah. If you are capable of marriage, then seek a righteous girl and hasten to marry to maintain your chastity.