My girlfriend and I split up about 4 months ago. The break up was basically caused by me drifting away and thinking I was better off alone. She is now dating a younger very good looking man she met at her crossfit gym. We were together 18 months and she moved from Minneapolis to Denver to be with me. I was recently diagnosed with ADHD (2 months after the split) after seeking counseling as to why I made the relationship decisions I had made. She knows I sought help after, but told me that she had moved on and was over me. We shared a fantastic relationship when we were together and my mind wasn't screwing me. She was my best friend and now that I'm medicated I realize she was the one. We still speak due to the fact that we share dog sitting responsibilities for a puppy we got together. Do I have a chance winning her back? She's very loyal when she's in a relationship and I don't think she'll stray from the new man.