If you had been Moses on the mountain, when God handed you the Ten Commandments, you would have replied, "Keep the sabbath? I do not need to do that, I have love."
Liberal Christians often support support abortion, murder, out of "love" for women. Conservative Christians often support murder of Arabs, out of "love" for Jews.
How does "love" stop you from "harmless" sins? How does love stop you from sins with a "greater good", such as robbing from the rich to give to the poor?
I try not to ever lie. It is not love that gives me this ability. It is commitment to the principle "do not lie". Is your love really so great that it prevents you from sinning?
Romans 5:20 The law was added so that the trespass might increase. But where sin increased, grace increased all the more. Breaking the law is a trespass, a sin.
Christians, out of love for God, obay his commands.