Your trip to Dallas was just a few days ago. No fairy tale ending. So sad. Your story made me cry. I am sorry this happened to you.
I hope you two find your way back together. Please do not contact her. Disconnect on social media.
If you are going to eventually be friends, it will only happen much later. She wants to be alone, so let her totally feel your absence from her life. Going no contact is probably your only chance of getting her back.
Because your partner has set the bar so high, it might be difficult to find someone new that measures up, because you must never settle for less.
I wish you the best in life John. Thanks for sharing such a personal story.