If I were to choose from my Umma anyone as my bosom friend, I would have chosen Abu Bakr.
Sahih Muslim Book 44, Hadith 5
← Previous Hadith If I were to choose a bosom friend I would have definitely chosen Abu Bakr as my bosom friend, but he is my brother and my companion and Allah, the Exalted and Gliorious. has taken your brother and companion (meaning Prophet himself) as a friend.

Sahih Muslim Book 44, Hadith 4 Next Hadith → If I were to choose as my bosom friend I would have chosen the son of Abu Quhafa (Abu Bakr) as my bosom friend.

Sahih Muslim Book 44, Hadith 6