Um, per your other post about your dad being crabby about your visiting back home on weekends, i would say this is not the best time to say goodbye to your ts.
I agree, they are not your friends, but they are not your dad either - i think they might want to be supportive thru this phase of your life. They are not personally affected by it as your father might feel he is, and that can be an advantage. They might have some ideas.