Dreams NEVER ever tell you something that is true about someone else. They tell you things about yourself.
I could dream my mother is pregnant, and it would NOT mean she is actually pregnant or wants to be, but it would mean that I had a (hidden) wish to have a brother/sister in the family.
That only the dreamer can interpret the dream correctly is not true. Many things in dreams can be generally the same and generally mean the same.
In your dream, where you dream about a man who is crying and says "I love you", it depends on if he is saying it to you or where/to who he is saying it in general. If he is saying it to you, your dream is telling you you are in love with him and you want him to love you back, but he isn't interested in you, and it hurts. Dreaming is a way of dealing with hurt and unsolved daily problems.
I don't know what you mean by "I saw his face as if nothing happens", so I cannot help you there.