Welcome @swajuihian, I think worrying about long term use of any medication is pretty normal. I've had similar questions on a few medications I take also. Here's some information I found on that discusses the topic.

"When tramadol is used for a long time, it may become habit-forming, causing mental or physical dependence. However, people who have continuing pain should not let the fear of dependence keep them from using narcotics to relieve their pain." --- Tramadol (Oral Route) Side Effects - Mayo Clinic: https://www.mayoclinic.org/drugs-supplements/tramadol-oral-route/side-effects/drg-20068050

Have you discussed your concern with your doctor?