It's okay to forget who you spent the majority of your time with before you met your signficant other... after all, they'll still be there once your babe dates you, right? When they get all whiney about you "forgetting to call them on their birthday" because you were "too busy getting a tattoo of your boyfriend's name on your wrist when you've only known him for two weeks"- just remind them that it is okay they feel that way, but it is improtant for them to remember that they are only pissed because they are jealous.