I believe that BB-8 had another owner before Poe Dameron. In the new trailer for Resistance, BB-8 seems to stay very close to Kazuda. Also in The Force Awakens, Poe calls BB-8 one of a kind. Possibly Poe was like a mentor to Kazuda. Maybe Kazuda dies before The Force Awakens and Poe and BB-8 become close friends. It seems unlikely but it is possible.