MJ,
I feel that it is not that unusual for a person to experience weird dreams, hallucinations and even sometimes full blow out of body experiences whenever they sleep outside of their normal nightly sleep cycle.
I think that the two girls in your unusual type of dream represent two aspects of your own inner personality, which are effectively in conflict with one another.
The happy girl is the positive, optimistic and hopeful side of your personality, while the lifeless one is essentially negative, pessimistic and fearful.
If you are currently in a relatively steady relationship, it suggests to me that your insecurities and fears about him walking out on you without a warning at any time he chooses are being allowed to get completely out of control of your better judgement, when there is no actual physical evidence that he would ever consider doing such a terrible thing to someone whom he loves dearly.
In other words the lifeless girl has become the dominant one by default.
If on the other hand you are not currently with a partner, then this could be the reason why you are hesitant to take the risks involved in doing this because soon after he becomes your boyfriend then he might very well walk out on you, as you have almost come to expect as being inevitable.
The lifeless girl or more fearful and pessimistic side of your personality wins again!
Don't let her do this to you.
From your friend in Oz,
EoT
![Image](http://fc01.deviantart.com/fs9/i/2006/019/f/7/_strong___revised_by_LeoLeonardo.gif)