I realize this story may be a little confusing so I'm going to clear some things up.
Haley James was the product of an affair Dan had with Lydia. She was taken away from her father, two older brothers, and step-mom when she was four by Lydia. Lydia wanted a fresh start and she didn't want Dan to have anything to do with Haley if he wouldn't marry her.
Rachel Gattina has been best friends with Haley since they were about five. They got really close when Haley was thirteen and she learned about the abuse. She played a big part in saving Haley. If it weren't for Rachel Haley would have died a long time ago. They had a small relationship before she left.
Chase Adams is like a big brother for Haley. He has been there for her since she was twelve. Anytime she needed a place to stay he would take her in. He helped her to patch up her injuries when she refused to go to the hospital. He has saved her from bleeding to deaths several times.
Chris Keller met Haley when she was fourteen and he was fifteen. They had a relationship. He was a shoulder for her to lean on. He was a lot of first for her. They were in love once but they both knew it would never last. Now they are just really good friends.
Brooke Davis is best friends with Jake. She doesn't talk to many people. She has the whole tough-girl-goth-punk-chick look going on. She is abused at home.
Jake Jagielski is best friends with Brooke. He's worried about her because of the abuse. He has a daughter to look after as well.
If you have any questions about anything else let me know.