Yeah. I agree with you that the boy wasn't crazy. He's crazy in love with the girl. Coz I think 23 is lot of meant to him that recalls the happiest moment of their life that they spent with each other. Maybe it's their anniversary. That's why he used heroine to ease the pain and when he's already high he planned it on the day and decided to ended his life. What a great plan. Lol ^_^.