To dream of something or someone being the opposite to you represents antagonism or conflict with goals. Feelings about the direction a situation is taking be the opposite to your wishes.
Alternatively, dreaming about something being the opposite may reflect feelings about something in your life being mysterious or a huge contrast to what you are used to. An amazing difference you are experiencing.
Negatively, opposites in dreams may feelings about someone in your life being ignorant or completely out of line with your views. You may be unnecessary putting up with it.
To dream of a person walking in the direction to you represents goals that are out of sync with your own. It may also reflect feelings about yourself walking away from your real goals.
Example: A man dreamed of a pretty girl walking in the direction to him. In waking life he discovered how nice it was to have his boss go on vacation and when his boss returned he began to feel that his aspirations for his future career where not going to be met if he kept his job.