Who is religiously responsible for preparing me for marriage, given my parents' separation and my living with my mother, knowing that I receive maintenance from my father and give it to my mother?

If you have sufficient wealth, your maintenance is not obligatory upon your father, mother, or anyone else. However, if you do not possess wealth and your father is capable, then your maintenance is obligatory upon him alone. Furnishing for marriage is not obligatory upon your father because it is not part of the obligatory maintenance; the husband is responsible for furnishing the marital home. Nevertheless, the father should observe custom in furnishing his daughter's needs appropriately, and the capable mother should assist in her furnishing as a gesture of honor and cooperation.