If i get bronchitis every few weeks, will i eventually need lung surgery?

No: No you will not. There are patients that are susceptible to recurrent bronchitis for a number of reasons (ie active smokers, patients with structural lung disease like bronchiectasis, patients with immunodeficiencies). It is best to see a lung specialist (pulmonologist) if you are having recurrent bronchitis to make sure there is nothing else going on. Surgery is unlikely.

Not necessarily: If the bronchitis develops an area of severe bronchiectasis, then surgery may be indicated to remove the area of bronchiectasis. But surgery will not cure the recurrent bronchitis. If smoking or exposed to occupational hazards (dust or chemical fumes), then may need to avoid those causes of bronchitis.