Are the actions mentioned in the question—placing a piece of paper with a person's name, their mother's name, the questioner's name, and her mother's name in water for 3 nights, then pouring it into the soil, with the intention of attracting someone for marriage—considered acts of sorcery? And can they be nullified if they are? What is the ruling on the relationship between them after he abandoned her and claimed to be bewitched? And will things return to normal between them?

The questioner's action is not considered magic. The alienation that occurred may be a trial from God or a consequence of sin due to the forbidden relationship outside the framework of marriage, and sins can negatively affect the life of their perpetrator. Repentance is one of the greatest means of lifting affliction. If there is a strong suspicion of magic, its treatment is possible and permissible through supplication and acts of obedience. It is best in supplication for marriage to entrust the matter to Allah Almighty and ask for facilitation in obtaining a righteous spouse.