I understand you're upset at the break-up but in days, weeks & months to come you'll likely reflect on this as a good thing.
You don't want to be tied to a narcissistic jerk for life; that's for sure - YOU DESERVE BETTER!!
Same applies to your future life with regard to smoking. You KNOW smoking is a danger to your health long term not to mention to your finances so why would you choose to continue to be a smoker? Makes as little sense as continuing on with a partner who mistreats you. Again; YOU DESERVE BETTER BECAUSE YOU'RE WORTH IT!
You quit smoking for yourself; period, full stop! No one else really benefits from it like you do so please consider getting back on the train with us and continuing with your quit.
Why not swallow all the bitter pills at once and start looking forward to a much, much better life in all respects> Please think about this seriously. Your life could depend on it.