It certainly can be sinful presumption. If your mindset about temptation is that you have confession as a back up plan to succumbing to temptation, then I would say that it is an improper mindset. Confession is certainly for people succumbing to temptation, but confession is not an excuse to give in to it. A mind set that I believe to be very helpful is knowing that God does not desire for me to give into temptation and that I do not have to with His help. Find a way to remember to pray in the midst of your temptation for God’s assistance to discern how to win.
Also, if you find yourself trying to be placed in the occasion of being tempted by something that you are desiring to do, that alone is sin (a near occasion of sin can be sin). Begin to find ways to serve and obey God, and don’t be consumed by just trying to stop sinning. Outweigh your personal evil with good.
I hope this is helpful!