I was born with bronchial asthma and i am 18 years old and still have it. will i be asthmatic for ever?

Probably: Asthma is generally considered a lifelong chronic illness with underlying airway inflammation and hyper-responsiveness. When treated appropriately is can be controlled to prevent irreversible remodeling of the airways, but there is no cure. You can go into periods of quiescence throughout your life, but asthma can re-activate at any time depending on the specific trigger.

Bronchial Asthma: If you have bronchial asthma sometimes you can go into remission with no asthmatic attacks for years but it can start again anytime in future.Some patients with childhood asthma have no attacks for years and it may start again smetime.I hope it answer your question.