My left ear can't hear anything since i was 7 and now I'm 16. I didn't go for any medical checkup because I thought that it'll go soon. But until now I can't hear in my left ear. Is it possible to hear again if I go see the Doctor?

You could have nerve damage that caused your hearing loss. Usually nerve damage can't be reversible but they could possible put implants in your ears that could make you hear. I know in America some new medical break throughs are helping people to be able to do the impossible that they thought never would happen.