i feel u man .. . 
i find it bit hard to defend my self for not having a GF 
to the topic,
staying away from alcohal was not a big deal for me but i m a smoker, i use to smoke alot in college days just to show off.. .but then quit as i didnt find it addictive as soon as i finished college. Still i smoke occasionally .. . 1 or 2 cgs a month or some times no cig for many months.