Repetition

So when I first got this app, I was in such good standing with my addiction. Literally my first go was 22 days, with that being my longest ever. But then I relapsed and now I can’t last longer than 2-3 days. I don’t know what happened I thought that after going so long with out it (when I did relapse) that I would end up being able last longer after that. However, that isn’t the case and I feel like other people may be struggling with that too and was curious how I can fix this attitude/habit.