Have said ‘I love you’ to her, and she said no politely, because of the pretty far distinct between us. I did not give up, and still call her and write to her frequently, and she still talks with me for a long time with happy motion. She told me that I am her best friend. But, she still doesn’t want to talk about love with me. I don’t know how she thinks about that on earth. She gives me a sense that she does not care about me at all. Should I go on or give up?