Sorry to hear about your dad
Ive gave up nearly 5 months ago now, I was diagnosed with small cell lung cancer last march and im only 26 have had chemo and part of my lung removed, sadly it wasnt a cure and i still have cancerous cells but its improved my life and given me more time to do the things i want.
I gave up pretty easily and went the cold turkey route didnt even think about smokng, but just recently things have been a bit stressful and i find myself wanting one but i try to take my mind off it. I do end up being a bit snappy and moody at times tho.