Jaylen Fryberg, a 15-year-old freshman from Marysville-Pilchuck High School, has been identified by eyewitnesses and family members as the alleged gunman who opened fire in the school's cafeteria Friday morning. Over the past month, his Twitter feed has been flooded with despondent statements: “I hate that I can’t live without you,” one tweet said.

Photos from his social media accounts show Fryberg with hunting rifles. He says he is Native American, a member of the Tulalip tribe. His last tweet was sent Thursday: “It won’t last… It’ll never last...” he wrote.

According to his tweets and friends who spoke with CNN, Fryberg recently “went through a breakup.” Social media photos show numerous photos with Fryberg and a girl. Captions include love messages to her.

Witness Jordan Luton told CNN the gunman walked into the school’s cafeteria and opened fire. He "came up from behind ... and fired about six bullets into the backs of them," Luton said. "They were his friends, so it wasn't just random." Police have not identified the gunman, however Fryberg’s family told KIRO7 Seattle and KOMO News that he was the shooter.

Rachel Pomeroy, a junior, told ABC News she spoke with Fryberg on Thursday. "He was fine the day before. He was being sassy, as always, and good," she said.

"He seemed like a nice guy, and he had lots of friends," Erick Cervantes, a junior, told NBC News.

Just last week Fryberg was crowned freshman homecoming prince. "He seemed like a normal kid," Madison White, a junior, said.