WTBH
Do you have a journal of events? Can you remember specific dates of different events? If so, write it all down. Start making a log of every little infraction (if you haven't already). Also, do you have friends and family who are willing to write a statement of times they have seen his behavior? You mother? Siblings? Any little thing may help your case, especially if it comes from someone other than yourself.
I'm so sorry your interview did not go as well as you hoped. :ghug3