10 Points: Do I have reason not to trust him?

[Susan]

Get the password to the email that his facebook sends all his notifications to. Then set up the email in your smartphone so that even if he erases the email, you still get it in your phone (just as long as you have push notifications on). Then you will see everything that facebook emails him. This only works if his settings in facebook allow it to email messages/comments and what not to him. If you can't get his email password, steal his phone and do "forgot my password" and have them text it to his phone..If his email service has this option. You might have to change his password to his email, but it will be a step closer.