Most Helpful Guy
Question one: The breakup does not preclude his feelings for and interest in you, especially if he is currently attached emotionally to you.
Question two: Sentimental value.
Question three: The fact that the breakup was his decision does not alleviate the pain of the reality of it.
Most Helpful Girl
He probably still loves you. Just because he broke up with you doesn't mean he doesn't have feelings for you still. He also sounds insecure, since he broke up with you over your supposed cheating. If it wasn't romantic messages, then he's insecure, and you did nothing wrong. However, he probably feels wronged and thats why he ended it, which can explain why he wants to keep your stuff, and why he cried on the phone. His feelings for you are still there, but his trust isn't. Overall, from just your information he seems a bit irrational.