Brother, I feel your pain.
And fuck booze. Good man staying away from that shit.
One word: Weed. I'm not sure what state you live in, but there may even be a doctor who would recommend you get some.
Sativa. STRONG sativa. You could have some with your ex.
Think about it. She might be into the badboy thing right now. You might look a little badass to her with some dank. Then when you get really fucked up, you tell her that dumping you was the best thing that ever happened to you. Then tell her you haven't really started dating yet. Tell lots of jokes and make her laugh. The weed will help you. Tell her that you KNOW she's dating and "it's cool". Tell her that you still have feelings for her and when SHE feels like SHE has played the field enough, to let you know. And that for now... you'd just like to be friends again. And say that shit like you mean it. Not too intense though. No creapy hugs or crying. Smile, and act happy. Not fake, just happy for you. Talk very little about yourself. Just listen to her, ask questions about things she wants to talk about and make her laugh if possible. The weed will help. Don't expect her to jump back into your arms. You will have to stay in contact and date other people. You will need to step your game and make her jealous. The weed will help. YOU WILL HAVE TO BE OK WITH OTHER MENS COCKS IN HER MOUTH. The "you know what" will help.
But one day, when the badboy she's with cheats on her, or she misses how you used to hit it - GUESS WHO'S THERE FOR HER? You, who bringith the CRON-cronic. Then we'll see who's the pimp.
Some things may not go according to plan. You may have to get treatment for sex addiction. You may find another honey that does it all, only better. Who knows? Anything's possible.
PM for details, my son. We'll work it out.