 Love of Allah means that you love the Quran. Love of the Quran, its sign is love of the Prophet. The sign of love of the Prophet, sallallahu alaihi wa sallam, is love of his sunnah. The sign of love of his sunnah is that you love the Akhira. And the sign that you love the Akhira is that you hate the dunya. And the sign that you hate the dunya is that you use it only to get you to the Akhira.