What are his motives in still being friendly with me so soon after the breakup? Sort of long, but please help?

He just wants to be friends. Like you said he confided in you and doesn't want to loose the friendship you guys had. He made a mistake, you left, he wants to be friends. You are being a bit of a jerk. Me and my ex bf are still great friends. I'm the girl he can be himself around but because he cheated on me I left. You act like he wants to you or something. Try being friends. If he wants to go farther and you don't tell him to leave you alone