Should i quit smokin?

ok, so, i am a smoker, a usual one, not a big one, but an addict. problem is, i don`t smoke only when i am nervous/depressed, i also smoke when when i am enjoying myself, when i feel like doing it, and to be honest, i don`t smoke depending on the mood i am into.. (ex: more when i am nervous / less when i am calm. no way.. i smoke equal.. maybe more when i am at a party and i am slowly - but certainly getting drunk :P) disregarding the future health problems and the money that goes into cigarettes, matters of which i am fully aware, what should i do tho?