I need some advice, i'm the mother of a 17yr old daughter. she and her father are no longer on speaking terms.?

she and her father stop speaking when she and his stepdaughter, whom she has been friends with since preschool, got into an argument and he decided to take sides with the stepdaughter, mainly because of the wife, so he stop speaking to his daughter, now she and the stepdaughter are back friends and he still does not speak to his daughter. anyway, she has always been a daddy's girl and i know she is hurting, i try to assure her that i love her more than anything but there's nothing like a daddy's love, especially the fact that she's going into her senior year in high school, she's popular so she's a shoe in for homecomming court, prom court and debutant, in which all events young girls are escorted by their fathers, i feel he is being the child in all this, she doesn't disrespect him, she just stays away, but he'll pass by her as if she doesn't exist. how do i handle these up coming events to make them special for her, should i go to her father myself( we don't get along) or should i just her handle it, she's doing well without him, she plays all sports in school and she damn good, she's an honor student,and she has the best personality, i just don't want this to be a soar factor in her life