If you were going out with a girl stupid enough to break up with you because she liked some ass on YouTube, you didn't lose anything. Any girl who's that stupid shouldn't deserve to have a boyfriend in the first place.
Girls like that shouldn't be made a big deal of. If they can't set realistic limits in their lives, they'll forever be living as a fangirl squealing for an actor or something. Set your sights on a girl whose head isn't in the clouds, that's all I can say.