How to stop drinking soda!?

So i'm a really healthy person.. which i kind of pride myself on. I'm vegetarian and love fruits and veggies more than candy and crap but i am ADDICTED to soda :( i try really hard to stop drinking it but my family loves it too so they buy it and im just so tempted! i tried to get them to stop buying it but they don't. SOMEONE tell me how to kick the habit!! caffeine reallllly is a drug :(