We ask and seek from Allah to grant us more Love to Him. The Du'a narrated from the Prophet (SAWA) states: O Allah, grant me loving You, loving those who love You and loving everything which makes me more near to You.
Allah says in Quran: The believers love Allah much more.(Sura 2, Verse 165).
We don't use the term of friendship with Allah, as friendship requires usually common or similar status between the friends. Allah is our Creator, Our Lord Who is showering on us every bounty. We love him to elevate ourselves from loving worldly things which can be harmful in the future.
The Prophet (SAWA) and Ahlul Bayt (AS) had the maximum love to Allah (SWT). More faith we achieve, the more we love Allah.
Wassalam.