TXHubby, I'd love to hear your theory on how I can fix this.
At this point you have to be the best you that you can be. Exercise, dress to kill, be outgoing and energetic. I know you have it in you. Also, be visible to your W. Don't make contact but don't avoid places where she'll be. When you were going to the b-ball games with friends, looking great, and having a great time, that worked. It got her attention.
The more out of sight you are, the more out of mind/heart you are. Don't become an introvert. That's highly unattractive. I once broke up with a girl. She was out of sight out of mind and it was easy for me to move on. Then I started bumping into her and she looked great and was happy. That drove me crazy and I wanted her back so bad. She would have none of it but still, seeing her like that is what pulled me back. If I hadn't seen her I would have moved on and forgotten her.
Don't reach out and make contact but do be visible to her and be your absolute best self when you are. I think that is your best chance for her to reach out to you.