FC, I can only tell you from experience that when they can't hurt you with the words they normally yell out they have to dig deeper and find something to say that they know will really push your buttons. His mission was accomplished tonight. I am certain that he does not belive that you are insane nor do all of the other people that know you.
Don't let something he said to you in a drunken conversation get to you. You know the trash that is dealt out during those times. And I certainly wouldn't be sleeping on the couch if I was you. Get your butt right into that bed. If you need more room, maybe you can take the sheet off the bed & slightly pull him off onto the floor.
Just for the record.....let me repeat......you are NOT insane!