Kindly take a check x ray of the teeth incase the gaps are increasing over the years before you start.. gap in your teeth can be closed using braces it would take time depending on the severity of the problem Other options would be to go for crowns or veneers but if the gaps are huge i would not recommend this option Many options are available today in the types of the braces in the market the cost factor would also depend on this

For increasing gaps in between teeth have so many reasons , once consult the near by dentist . For your problem if braces is the right solution than it will take 12 months to 18 months for your age depending the gaps .