Dreaming about familiarities with strangers means you should be cautious and recommends to you not telling all of your problems to others.
Dream dictionary: Familiarities dream meanings
…(See Fen and Accounts.) To dream of writing a letter, foretells that absent friends are about to visit you: if a girl dreams of writing a love-letter, it is a sign that her lover will soon return and clasp her in his arms, if she shows any such familiarities. To dream you make a blot while writing, is a sign of sickness. Lucky lottery dream numbers – 14….