What shall i do to make my girlfriend quit smoking ?

Tweet

10 cigarretes a day...........yes this is the state of my beloved girlfriend,and am now fed up of her smoking ...she is very cute and beautiful and the only one in my life who loves me the most..thats the reason why i never ever thought of leaving her.....now the situation is that she's got either to choose me or smoking.....but she would break down if i do so..i know that.i did tried to get her to rehab center but all in vain.........what shall i do now?