In dreams, it really makes no difference whether the dreamer or some one else is falling. Other people in dreams usually represent the dreamer. Falling can merely represent "falling" asleep, or it can mean feeling totally out of control in some area of life.
You're falling in love of course!
It means... you are going insane.
Every dream is about the person having the dream. So this dream of your double is about the person that dreamt that dream, not about you.
It means that you might just be falling in love with this person. If they are dreaming about you it means that you guys are meant for each other and always have been.
This dream indicates that you have accepted the reality of this loved-one's death. The falling snow represents a peaceful end.
that you should watch out for falling trees
You want to be in love with someone, or you are falling in love now.
The dream is not about that other "someone" but about yourself in some way. That other person represents you. The dream suggests that you view success in general as perilous, and that it only leads to ruin and personal tragedy.
This is a very common sort of dream that tends to occur as a person is just beginning to fall asleep. The darkness merely expresses the darkness of night and/or closed eyes, while the sensation of falling is a pun (word play) on the expression "falling asleep." The dream suggests that one portion of the mind is resisting sleep.
This dream might indicate that you do not entirely trust this particular friend. However, that friend in the dream could also be a symbol representing someone or something else. The focus of the dream might not be on the person pushing (betraying) you but rather on your feeling threatened and vulnerable.
The dream of falling.
Tell him to stay away from trees.