Girl I use to like, chances of her coming back for me?

I liked a girl for about a month. I legit thought she liked me so i asked her out on a date and it went great. After the date she seemed to have lost interest in me, she never texted me again and avoided eye contact with me at work. After she quit work (school purposes) she threw an end of the summer party. I found out she had a threesome and banged some dude i use to work with. She was trying to make me jealous all night and the next day, like she was playing games but it had no effect on me.

Anyways, after the party i lost all interest and havent heard from her in over a week. Shes not on my mind anymore, but through connections i will still run into her from time to time. Like i said, first date went great and i miss who I THOUGHT SHE WAS but what are the chances that this kind of girl would come back for me?