My first cousin is dating a guy that had a "back injury" right before meeting her, he never went to the doctor for it and claims to use one of his family members scripts for his pain pills, which he consumes by the fist full. HE'S A DOPE HEAD plain and simple, he is never lucid and I am very uncomfortable around him. At our family Christmas party he came and was nodding out mid conversation during dinner. Many of my other relatives have noticed this as well. My fiance and I had a party at our house and my fiance followed him whenever he wondered off, because he did not trust him in our house. I do NOT want this guy at my wedding or anywhere near my son, I should not have to worry about this guy digging through my guests stuff in the coat closet (there is no coat check) Oh and things have gone missing at some family get togethers since she starting bringing him around. Just back story, they do not live together, and my cousin is only 19 and still lives at home with her mother.
So basically I would like some advice as to how any of you would handle such an awkward situation.