What to do if i have tmj as long as i can remember (since middle school), but no pain. would i still need to seek treatment?

Please no: As long as you don't have painful symptoms, i would suggest being as conservative as possible. Sometimes the TMJ treatment opens up new symptoms.

Depends: Depends on symptoms. If it doesn't bother you, unlikely you need treatment.

Definitely, no: If there's no pain, swelling or limitation of movement associated with your jaw clicking, you probably don't need treatment for a TMJ disorder. Take care.