So me and this girl were dating for about 3 years, and were great friends for years before that. We broke up about 2 months ago but are still keeping in touch. Recently, I found out that she started selling drugs. I know that this is my fault, because I was the one who got her into them in the first place. She has so much potential and I would hate to see her waste it in jail. Shes already been robbed once, and her supplier is known by the police to be a dealer. What should I do try and get her to stop before she fucks up?

Talk to her?

I've tried that, she ended up crying and agreeing with me, but the next day she was still selling.

Go and talk to her. Help her to see reason. She might hate you for it now, but she'd thank you later. It's a shame that so many brilliant minds get lost in a sea of drugs these days.