I'm sorry that happened, Sueski. You know he's just baiting you so he can blame you for his drinking, right?
Maybe practice for next time.
"Well, it's not true, but I can't keep you from thinking that. So, how was your day?"
"*chuckle* I'm afraid you really have it all wrong. Your cousin just isn't my type. Now your friend _________, well, that's another story!"
"Oh? Well, thank you for letting me know how you feel."