Neither does it depend on love received. He offers it freely to everyone, i.e., no one is undeserving of it. His is a love that is all embracing, universal. In loving ice cream or a game, we are the subjects of love as it brings us pleasure. The welfare and happiness of the one loved is the primary concern of the one loving.
Love also respects the freedom of the person loved.
All throughout, He never forced them love Him nor to accept His teachings. He let them be and progress according to each one's pace. Thus after three years, though still short of His expectations, they became different persons. Which is normal because love allows a person to continuously grow in freedom. Finally, love requires fidelity to duty which in turn requires sacrifice.