"A.W. Tozer said that God is easy to please, but difficult to satisfy."
Yes, but I don't remember anything in his writing that implied that God would only love us conditionally. In fact I believe he wrote the opposite.
There is plenty of "if you will____, then I will ____" in the Bible, both Old and New Testament. I think we're getting Love and Relationship confused. God loves all mankind perfectly and infinitely, yet will condemn the majority of mankind to separation in Hell.