Free will has absolutely nothing to do with making decisions or making choices. Free will is nothing more than a failure to understand that the will of the lost man is not free. It is in bondage to the law of sin and death. Romans 8:2 For the law of the Spirit of life in Christ Jesus hath made me free from the law of sin and death.
The scripture you quoted does not prove the claims you make. Romans 8:2 states that Paul, and by natural implied extension all the redeemed, are free from the law of sin and death; it does not state that lost men have no free will, nor that free will has nothing to do with decision making. Not directly, certainly, and as far as I know not indirectly, either. (If there are scriptures showing that the law of sin and death states those things, I would very much like to hear them.)
This is probably a good exemplar of the conversations I've had on this topic. A claim plus a verse, minus sufficient applicability to the claim, does not make the case. I have yet to hear an anti-free-will argument that was biblically compelling. In between the claim and the verse, there has always been a gap that is filled with something other than scripture, usually a "therefore I think it has to be" kind of reasoning.
In my experience, the Calvinist position seems to be "I know God is sovereign, and I can prove it from scripture, therefore I cannot see how man could possibly have free will." While the Arminian position seems to be "I know God calls the lost to choose to repent, and I must believe on Christ to be saved, and I can prove those from scripture, therefore I cannot see how I would retain my salvation if as a believer I then chose to reject Christ."
Yet I have never found, nor has anyone shown me, any scripture that clearly states that man has no free will, nor that salvation once gifted can be lost. Both beliefs seem to be conclusions drawn by people who cannot imagine how God's universe could make sense otherwise. Both views start with scripture, progress to extrapolation, but never seem to come around to finding scripture to support the extrapolated conclusions. As a much wiser man than I once said, "Both are correct in what they assert but incorrect in what they deny."
It is very possible that I oversimplify here. It's possible that I fail to adequately understand or describe either or both of the end-of-spectrum positions because no representative of either has yet made for me a compelling argument where the claims made and the scriptures cited undeniably connected in the middle. Thus, what I am left with, as in other areas of scripture, is the understanding that His ways are higher than my ways, my mind is finite, and although there exist scriptures that may seem contradictory to man, they are in harmony for God. Thus I cannot embrace any position that focuses on one set of God-breathed verses but cannot seem to be reconciled with another set.