Kicking the habit

I'm trying rather hard to quit this habit I've had for around 2 years now. It's tough!!! It's not much of a plus, but I have company. Have this idiot friend who's trying to quit smoking. Our conversations go like this:
Me: "This is frigging hard man"
S: " You are telling me. It's been 65 hours. And all the idiots I stay with have been smoking like chimneys to show me what I'm missing"
Me: "Ouch. I've lasted 91 hours. And I'm contemplating chucking my phone"
S: "Sounds like a plan. Keep telling you it's karma man. You talk me into quitting smoking, least I can do is watch you miserable. (Pause) Oh wait. You were miserable then. So you wanted out. But you are still miserable. (Pause) You're just fucked up in the head."
Me: "I have no idea why I talk to you. Ass. (Pause) Maybe they are right. I am masochistic. I like being miserable, which is why I am listening to a jackass like you say all this. (Pause) But then I didn't like being miserable. Ugh. You're right. I am just fucked in the head"
S: "I love talking to you. Every time I feel like a stupid pig, I talk to you and feel so much better about being me! (Pause) Honestly, you are so confused I'd be surprised if you even remember your own name. (Pause) Do you remember mine?"
Me: "I so wish I didn't. At least I wouldn't call you"
S: "Haha. (Voice dripping sarcasm) Why don't you resort to that brilliant technique you turn to when faced with dilemmas? It's such an absolutely flawless idiotproof solution - toss a coin"
Me: "I could stuff it up your a#$, but that'd be disgusting. For me. So I toss. Anyhow, I'll go watch tv now, at least that's my chosen resort to my sudden pangs. As against you, who spends half the day in the loo coz you choose to drink water each time you felt like smoking. That's so fucking brilliant isn't it?"
S: "(Long pause) Wow this whole thing is getting onto our nerves isn't it? It's not fun"
Me: "I know. Ugh. I hate you. Talk to you later"
S: "Likewise. Later. Bye"

And that's a fair picture of how I am all day. Pissed off. (As is S, albeit in a more literal sense of the phrase)
Had no idea it'd be this hard. Future advice to self: un-Habit.