how do i stop drink driving?

it started off as a one time thing you know, “what are the chances of me being pulled over out of everyone” but now everytime i go out with friends i tell myself i won’t drink or only drink a little but i always end up getting drunk or tipsy and driving back as i have no other way home. i know not to be drunk or even tipsy while driving because i’m not THAT reckless and stupid but the problem is my BAC would still be over the legal limit. i’ve even wished that i had one of those cars that automatically tests if you’ve drank when behind the wheel. what can i seriously do to quit this terrible habit i’ve picked up?