He and his sister eventually go to visit his dad and he tries to call Rachel who then cuts contact with him because he's been treating her so bad. Rachel is pretty good friends with sam in the story too he eventually has a conversation with puck about her. I think puck eventually calls his mother in to help him sort out his problems and try to fix things with Rachel.
This is about as much as I remember, I'd really love to read it again so fingers crossed it rings a bell with someone. Thanks.