Snow Angels (2007) on Netflix

On a cold afternoon, with snow on the ground, the high school band is practicing for the last football game. They hear shots. Flashback a few weeks before. Arthur is a high school student, bussing at a restaurant. Annie and Barb are waitresses there - Annie was Arthur's babysitter when he was little. She's now separated from her husband Glenn, who's on the wagon, starting a new job, praying to Jesus, and trying to prove he has his balance back so he can see more of their small daughter, Tara. Annie's seeing someone else, Arthur's parents have just separated, and Arthur is attracted to Lila, a new student at the high school. It's a small town, people's lives cross.