Please visit a specialist who would guide you with various treatment  options for closing the spaces, to name a few there are veneers, crowns or cosmetic fillings but all depend upon the amount of spaces. Please discuss with your dentist and consider braces as well as an option but that's the most sensible option keeping your age in mind. With advancement in technology new options in braces are also there which are cosmetically pleasing and very comfortable.

You can go for veneers and crowns but before that visit a dentist :)

you can consider a smile makeover which includes veneers or crowns for your front teeth. As you are young i would suggest you look in an orthodontic correction.. nowadays new variations of braces have replaced the old metal braces that we all know. consult a dentist and ask for information on invisalign.

Hello.. orthodontic treatment would be a better treatment option for your problem (braces) but still if ur not interested in it.. u can go for caps over the teeth to cover the gap.. before this, consultation with a dentist is preferred as to know the underlying cause for the gap...as in few cases, due to thick frenal attachment in between  the upper front teeth, a gap develops.. in such cases, the treatment might vary..