Did you ever have that friend who at a bar would buy a woman all her drinks and at the end of the night she would leave with another man? That is where you are at right now. I hate to tell you this but they probably got a good laugh about it later on.
You should ignore her non business texts she is living with another man.
There are no tricks, techniques that are going to make her think you moved on. Until you realize that this is BS you will continue to suffer.
Sorry man I know it’s hard but that is the reality you’ve living.