Forgetting who people are is read as fear of losing your connections or your sense of self. Seen in a loved one, it often reflects worry and the ache of watching someone change.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.