Is it necessary to contact women with whom forbidden relationships were established to ask for forgiveness, or is sincere repentance sufficient, considering that this is a sin related to the Creator?

You must hasten to repent to Allah Almighty from unlawful relationships with women, by abandoning the sin, regretting having committed it, and resolving not to return to it. It is not a condition of repentance to find girls attractive; rather, you must avoid any contact with them to cut off the door to temptation. For true repentance necessitates avoiding the causes of sin and cutting off the paths that lead to it.