A believer's love of Allah should be, fundamentally, a love manifest in complete obedience to the laws of Allah.
As Allah says in Surah Aal 'Imraan, "If you love Allah, then follow me [the Prophet] and Allah will love you." [(3):31]
This is not an abstract concept, because human love of other humans also implies obedience, i.e., if a loved one requests that something be done, humans will strive to do it according to the level of their love for that person.
Dr. Bilal Philips