Trying to convince the gf to stop smoking

[Tom]

I need some tips... I have tried everything, telling her how badly i hate it and thats hate with a mother fudging passion absolutely cant stand it, i tried all the lung cancer, your gonna die way before me, etcetc... then i tried you look stupid, you breath stinks etcetc
But according to her friends shes cut back loads and according to her she hasnt smoked for 2 weeks but whenever she drinks or sees her friends smoking and they offer her she cant help herself and smokes then ruins it and we have to start over :/ So i need help lol
I always told myself i'd never go out with someone that smokes but shes different i guess

Anyway yeh i know im a soppy git