I am a 19 years old guy and I have a problem when I smile or talk that it is clearly shown that the teeth in front, I have one of them which is shorter than the others, what can I do about that ? It is very annoying. Thank You

You could have that tooth capped to match the others.

Tick

How is that a problem?
Look at Dave Letterman's gapped tooth smile. He capitalizes on it and is a billionaire.

You can have a material added to the bottom ( or top, depending if it is upper or lower tooth) of that tooth to give it length. The material is a white or tooth colored. A good DDS can add this and no one will even know it is there. It will cost a lot less then having a crown done. This will be considered cosmetic, so your dental ins. Might not pay for it (if you have dental ins)
I hope this helps you out.
GOOD LUCK