person A: My brother promised me he would always be there for me. He hasn't let me down yet.
person B: That's so wonderful! I had a very close relationship with my sister too. I always treasured it and loved her so much!
person A: He truly is my best friend.
person B: That's so great. My sister was mine too. She passed away several years ago_comma_ so never take him for granted and treasure every moment with him!