Do what YOU want: temporary, short lived happiness. Do what GOD wants & be HOLY: eternal true happiness. So what do you want: short lived, nonsustaining, false "happiness" OR true everlasting happiness? The choice is Yours
"Why, then, did God give them free will? Because free will, though it makes evil possible, is also the only thing that makes possible any love of joy worth having. Lewis on free will from "The Case for Christianity.