I have one of my teeth that is longer than the others and it spoiled my smile. How much is it to fix my teeth? (photo)

Two possibilities here. 1. you may be able to simply have the teeth cosmeticallly contoured. 2. Invisalign to straighten the smile. See a cosmetic dentist in your area.

basic issue is with upper 6 front teeth. right side later is little longer just because it is in uprighted straight position. best option in your case is aligner treatment to align front six teeth. it is my advice to ask your local dentist for cost. 

Thanks for sending over your photo.  Unfortunately with only the photo of your smile I am unable to determine what is wrong if anything with the tooth (why it is longer).  I would seek care from a dentist in New London, CT and ask them to discuss your treatment options.  It may simply be something that can be filed down but without doing an complete evaluation I am not sure.   Good luck