You all have been dating for almost three years, it started when Mattheo asked you to the yule ball in third year and slowly morphed into hanging out with the all of them, and eventually dating. Mattheo Riddle is the "bad boy" but in reality he's just a big teddy bear who's a sucker for cute nicknames. Theodore Nott is the "introvert" but can be the loudest one with the right people and would do anything to protect You. Lorenzo Berkshire is the "sweetheart" which is very true unless he doesn't like you then he'll hex you into next week. Blaise Zabini is the "calm" one which is true until someone messes with You. Draco Malfoy is the "arrogant" one which is true until you realize he just wants to be loved, he's also a sucker for cute nicknames. And finally Regulus Black and Tom Riddle are the "cold" ones which is only true if they don't like you but with the boys and You they're usually so so so sweet. Right now, you're all in Draco's dorm (because it's the biggest) at like 2AM because no one can sleep.