This one aint coming back. She's gone down a bad road and there's nothing you can do to turn her around. Be polite to her if she contacts you but nothing else. There's no point in anything else. She is long gone. Keep getting in shape and doing yoga. Look forward to your career. Be excited for the future and who your next GF will be. Get productive make some changes! Life is too short to fret about someone else who doesnt give a fluck about you. She doesn't deserve anything from you now. Let her live shallowly. She will regret it eventually. I don't owe this person anything and shouldnt even be thinking about them. No anger, no depression, nada zilch zero nothing. she doesnt deserve your concern of her destructive behavior. It's not my problem anymore. Let her **** her life up. I broke up with her. That's her punishment for the way she treated me in the end. Rid your mind of this person. Shes not worth it.
Treasure the memories you have with her but understand that you can never have anymore with the way she is now. It would be party party party drink and be stupid constantly. One massive headache. You don't want that. You need someone more mature. Your next gf will be old enough mentally to understand your value. She unfortuantely wasnt able to.
If she talks to you online just say to yourself "heh there's that girl, nothing special, just like the rest" and be polite. thats all.
She's not coming back, but I'm okay with that.
I'm a man.