Does asthma disappear?

I had asthma as a child. The last I needed medicine I was 16 or 17. Now I am 19. Did I out grow it?
Update: Can I ask my doctor if I still have asthma? Is there a test? Its been three years since to used my inhaler. I don't want to sound stupid so that why I'm asking if asthma goes away.
Update 2: I live in the same place so there is no change in environment.
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