Marijuana 
To dream of marijuana implies that you have reached a new level of spiritual discovery. It will benefit you to use this knowledge towards current situations. The dream may also suggest that you should be gathering strength from your own character rather than depending on others.
Sexuality
To dream about your own sexuality symbolizes the mysteries of our existence. Matters regarding life and death may be causing you some concern. In addition, it indicates that you may worry that you are no longer attractive to the opposite sex.
Ballerina
Are you the ballerina in your dream? If so, you are indicating a very graceful heart and the ability to find self-discipline in order to conquer a situation in your life you are anticipating with reticence.
Dreaming of watching a ballerina indicates that you are seeing a graceful aspect of yourself that you are as yet unaware you possess. Your life is going according to plan so relax and make changes gently as you see fit.
Dreaming that you are unable to stop dancing indicates that you may work too hard and expect too much of yourself at times.
Girlfriend
To dream about your girlfriend signifies the way you truly feel about her and the dynamics of the relationship itself.