an unfortunate condition where a girl, who might have actually been a decent friend/person prior to getting a boyfriend, turns into a huge douchebag.
-becomes completely absorbed in her relationship
-stops spending time with her real, genuine friends and ditches them to spend time with her boyfriend (who is usually a huge asshole) and his dumb bros
-gives into her boyfriend's every desire and hangs on every word that comes out of his mouth, acts like his property
-makes up elaborate lies to get away with her shitty behavior
-tries to give other girls advice about guys
-doesn't care about anything other than her stupid boyfriend
-will spend innumerable amounts of hours watching her boyfriend and his friends play video games, but won't answer calls or texts from her actual friends
-will likely fall on her ass all alone after the break-up because she has alienated all of her real friends
I used to hang out with Chelsea, but she got awful boyfrienditis when she and Sean started going out. I just stopped trying to be her friend.
A curious condition where a woman is completely obsessed with her boyfriend to the point she no longer cares about anything else. School/uni, hobbies, friends, career etc. no longer seem important to a woman infected with boyfrienditis. It is usually recognised by the exessive use of makeup and non-stop talking about the boy.
Jill's boyfrienditis caused her to not study for her exams.