Am I a candidate for closed rhinoplasty/tip plasty?

Hello and thank you for your question. Your nose may require improved tip support in order to prevent your nose from drooping when you smile.  Your nostrils can also be made smaller with rhinoplasty.  Nasal tip refinement and a cephalic rotation of your tip can be performed to turn
up your tip slightly.  Make
sure you specifically look at before and after pictures of real patients
who have had this surgery performed by your surgeon and not just a computer
animation system.  You should be able to
view numerous pictures of actual patients with noses similar to yours performed
by your surgeon.  If you cannot find
enough real before and after pictures, then consider continuing your search for
a surgeon.
Best wishes and good luck.
Richard G. Reish, M.D. FACS
Harvard-trained plastic surgeon

I would recommend starting with a consultation with a board certified facial plastic surgeon that specializes in rhinoplasty surgery to discuss if rhinoplasty can address your concerns. 
I would recommend writing down the following questions before scheduling your consultation:
1. Are you unhappy with the tip of your nose? 
2. Do you feel that your nose is too wide? 
3. Do you want to make your nostrils smaller in appearance? 
4. Are you looking to decrease the general size of your nose?
I hope some of these questions will help you pinpoint what it is that you don't like about your nose.  Cost will vary due to various factors like anesthesia fees, facilities fees, etc. I wish you the best as you research your options when scheduling a rhinoplasty consultation.
Sincerely,
Philip J. Miller, MD, FACS Double Board Certified Facial Plastic Surgeon

Your nose could be improved with rhinoplasty, which would give permanent improvements in symmetry and shape which could improve your tip. You can bring the pictures that you think would be flattering to your face and these can be discussed.  It takes special interest and study to understand the facial aesthetics to create a nose that is harmonious with your other features. Take the time to find the right facial plastic surgeon and ask them to create digital images of the nose they propose for you and discuss the cost.
Hope this helps.