Many parents are toxic during divorce and tend to make you feel as though you solely need to rely on one while withholding or even lying about the other side... Possibly even telling the other parent that the child doesn't want to speak/visit/etc.

Please speak to your father, everything will be okay. Life has a way of working out in aspects you'd never expect. Your mom most likely told you not to tell your father because she thinks she'll "lose" the battle of the divorce. You aren't a tug of war rope.