Can you please tell me if i will ever heal completely from a tbi?

Please see below: Your question is extremely general. Tbi can be mild, moderate or severe. The more severe head injury the less the chance of recovery. Often younger patients brains have more elasticity and thus higher chance of recovery. Older patients also tend to have other comorbidities that negatively affect prognosis. Also if there is shear injury to the white matter fibers the less chance for recovery.

Very possibly: This depends on the degree and the nature of the tbi. Was there surgery involved. Was there a prolonged coma? Was there structural brain damage seen on ct scans or MRI scans? Rehabilitation with physical, occupational, and speech therapy are key to recover.