Yes it will remain same whole life and will appear like scar or white patch on X-ray. It will not hurt you until it comes with hemoptysis( bleeding from this area). Right now there is no indication for surgical removal of this part. So you have to live with it. No medication can reverse it ( scar ). Your investigation for tuberculosis were negetive.
Next Steps
Get a CT thorax done if it shows old healed fibrotic changes then you are clear of TB as rest of your investigation are normal.
Health Tips
Avoid infected people and maintain your immunity