This is where Charlie met Patrick and Sam and a huge turning point in his life.
This is when Charlie went to the after party of their school dance with Sam and Patrick and by accidentally ate weed brownies.
This is when Bill tell Charlie he is a special kid. After Charlie went over to eat with bill and his new girlfriend.
Your special Charlie.
This is when Charlie had his memories triggered of his Aunt Helen sexually assaulting him. Because, Sam who he loves were getting it on the night before but he stopped it going any further. The next day when she was leaving Sam put her hand on his shoulders before she left and his aunt did the same thing on every Saturday morning after what she would do to him.
This is Charlie in the hospital because he broke down after the situation with Sam and couldn't remember the two weeks that he broke down. Multiple people visited him during that time.