<human>: Summarize the given text in a few sentences.

I'll try to make this short. My little brother has his first serious girlfriend. They've been dating for a few months now. She has always exhibited signs of daddy issues, dishonesty, etc. Stories about her rich mom's boyfriend that drives Ferraris and other general nonsense.

The first red flag was when she was caught hanging out at some college dude's apartment. The guy actually found out she was dating my little brother and sent him a message to clue him in. Once she was confronted she put on a show about how sorry she was and how it would never happen again.

Then there are the posts on facebook that come from general teenage angst. Status updates about how no one cares and how alone she is if they miss one day of hanging out, etc. 

Last night after one of these she tried to "kill herself". I put that in quotes because I highly doubt she actually took anything. She called the police and then hung up, so as my brother was arriving so were the police. She was "unconscious" on the living room floor. She claimed she took Vicodin and muscle relaxers. 

Last night my brother sent me a text and I tried to explain as gently as I could that he needed to bail. He's convinced that he has to be one to help her because she lives a very hard life. He's young, naive, hormonal, and my parents have always taken a hands off approach on these sort of situations and say its up to him.
<bot>: How do I stop this before it becomes an unplanned pregnancy or develops into an abusive relationship? Is there no hope aside from learning the hard way?