Thanks for the picture!! that really helps.
#1- You might not be old enough. I can't tell from the photo, but you look quite young. If you're not, take that as a compliment :-). Invisalign has age requirements.
#2- If I were you I would discuss with your cosmetic dentist options for a) closing the space 2) doing two veneers on your lateral teeth (teeth right next to). This will really create nice proportions for entire smile.
You might be able to do Invisalign Express. Which is about 1/2 price of full Invisalign. Also speak with your dentist. I'd be able to close this using a series of retainers for much less than Invisalign's fee.





