How can I shorten my front teeth? (Photo)

It looks to me that your best options for your smile is to see a orthodontist who can do Invisalign for you.  It is the clear braces and will torque and tweek your smile so that things are more balanced.  Once you have completed your treatment if you still feel the front teeth are too big then you can reshape them.  It is worth the cost and effort-Talk about a payment plan so it is affordable to you.  Get more than one opinion if you want.  Good Luck!