As a #codependent, a relationship with a #narcissist, #borderline, #histrionic or some combination of the #ClusterB variety pack is akin to being a 24/7/365 #DesignatedDriver. Entertaining at the start of the evening and #FML toward the end.
Perhaps it's time to take a night (or the rest of your life) and let them get an Uber Enabler and/or suffer the consequences of their irresponsibility and self-destructive behavior for once.