>>1 NUMBER 1: The best advice any adult can give to you...
Cut drama out of your life.
It's just like "spring cleaning" your Facebook so that only people you give a damn about surround you.
You can do the same thing in real life, because guess what? This guy sounds like an asshole, he will likely dump your friend again and who is your friend going to push all her baggage on to?
You.
You in the midst of whatever is going on with your life at the moment.
You could be having a fairly good day, but her poor choices and depression will likely drag your mood like a sinking anchor.
If you think this is too "severe", then lemme give you a story.
I had a good friend in high school; she was sweet, persistent, and understanding.
But she was also a habitual liar.
I gave condoms to her once as a gag gift and she actually used them.
And when her parents found the used box, she said they were from me (which is true), but she said that I had already given them to her half empty...
Her FATHER...was my TEACHER.
And even when I tried explaining to him what happened and that she lied, and that it was a gag gift, he called me a "whore".
We didn't talk for weeks afterwards, but after she apologized so many times I thought, her friends should forgive and forget, right?
WRONG.
She lied to me again about her dad threatening to rape her, and how she couldn't tell her mother, about how she did tell her mother, but oh wait she didn't tell her mother, actually he didn't try to rape her he was just drunk, oh no now he's physically abusive, but no she can't tell anyone because she desperately want to go to this Mormon university in UTAH that needs a Mormon (her Dad) to be a reference to her religion.
After all that drama was done, she told me how she couldn't wait to start fucking boys in college.
I deleted her Facebook, her Skype, her email, and her number.
Never been happier.