In most relationships, the following statement is a very simple and obvious one: our romantic partners should live up to their titles and act like partners . But this woman’s partner , whose story she posted to Reddit for advice doesn’t seem to get it. The original poster (OP), a 20-year-old woman, tried to do something nice for her boyfriend's birthday, planning a fancy dinner date. But things went sideways fast when the boyfriend showed up with his buddy and the buddy's girlfriend without giv…