I found his last letter from his laptop computer after his first attempt to kill himself.

it said he's tired of being lonely and hated and he suffered about those and me and my... our parents didn't know a thing. He asked me to put this here for some reason. I should investigate his computer more if i find something new

He suffered because there was someone who he loved, but she didn't love him back she just used him, cheated him, and lied many times to him. My bro was depressed and almost died cause of it.

He typed lot's a things about him and her, and he asked me to do some thing with those