Breaking rules or cheating on a Lover

Came across a line the other day that i can't get out of my head.
'It is a very different thing to break a rule than to cheat on a lover.'
Why is it we so often live our lives in fear of breaking one of God's rules, as opposed to breaking the heart of the Lover of our souls. I think the former kind of mindset is one which sums up much of the evangelical understanding of God in Northern Ireland. It is one that we need to shake, a stronghold of the mind that needs to be shattered because quite frankly i think that it hurts the heart of God. I am not saying rules, or better, boundaries are not important. They are and we all need them. But surely our motivation as Christians is rooted in the love of Jesus, that God desires would capture our hearts so that our response to Him is out of love, aided by His Spirit. If it's not, i have to conclude, i think we are missing the point. God is not up there counting our rights and wrongs to see what score we can accumlate. Rather God is a Father who gets incredible deep joy from His sons and daughters who obey Him because they are infatuated with His son Jesus, and on the other hand, He is a God who is incredibly grieved when they choose to flirt with other gods and seek that love in other places. It's not about keep rules, ticking boxes or following formulas, it is about passionatley, obsessively, undeniably and dangerously loving Jesus.