My best friend who is dead called me on the phone and asked me some arbitrary question, then suddenly appeared as though it was no big deal
Dreams are highly personal and can hold different meanings for different individuals. However, based on the description provided, the dream about your deceased best friend calling you on the phone may symbolize a desire for connection and a longing to reconnect with them. The fact that they appeared as though it was no big deal could suggest that they have transcended the physical world and are at peace. It may also indicate that their presence in your life, even in your dreams, brings comfort and a sense of normality. Overall, this dream may be a reflection of your ongoing grief process and a way for your subconscious mind to process and maintain the bond you had with your best friend.