My advice is to just move on with life.
We here in the LGBTQ stream love you for being genderfluid, and we can help you through whatever hardships that you might face in the future.
And if she tries to get back together with you again, don't take the bait. Based off of how she's acted previously, it won't be a healthy relationship, and someone is going to end up either physically or emotionally hurt.
Come and memechat me if you need help with this or anything else, I'll do what I can to help.