Hi Cohiba,
I think for someone with your history you're doing brilliantly at the moment. My only advice to you is to 'play the tape through to the end'. Carry on as you were doing and see yourself approaching say 50, with drink and drug related debts, ill-health, missed opportunities and quite probably, many regrets. Believe me - I lived that way and although I'm loathe to admit it, I wish I could go back to your age and do it all again sober! Stick with it, get to the fight date and see if you really want to lose what you've gained. You never know, one of the boxers may get injured and the fight postponed for months - it happens often enough. You might not want to bother with the rescheduled one.
Kell Brook would have them both anyway!
Best of luck!
C