EV, that is really sad
My dad used to be like that. He would even hang up on me mid-conversation if I called home from college and my mom wasn't home to talk to me. He just didn't seem to care.
He has changed now, and I think it's mostly because now that my parents are divorced, he's lonely. Now I'm the one who doesn't really feel like talking with him sometimes.
I wish I knew what to say about your mom. Have you ever thought about telling her that you'd like more conversation, and more of her attention??
Angela