How can I make my vagina lips tighter?

Why ? More info.....at your age I assume you have not delivered an infant??? This is something you should discuss with your Gynecologist! (or get counseling about!!!!!) Hope this helps! Dr Z.
ToHaveAndHaveNot. "Just pucker-up and blow..." Well, maybe not. It worked for Lauren Bacall but if your boyfriend isn't Humphrey Bogart I guess it won't for you. Do I date myself? The pelvic floor muscles surround both the vagina and vaginal wall muscle, so maybe Kegel Exercises will help: http://www.mayoclinic.org/healthy-lifestyle/womens-health/in-depth/kegel-exercises/art-20045283. Also Yoga or Pilates may help.