A. Recurrent dreams are a sign of thoughts that occupy the dreamer much, consciously or unconsciously. Sometimes those dreams are unpleasant, a sign or symbol of some conflict situation that you still have to overcome. Ask yourself what the dream signifies - probably you can interpret it better than anybody else, since you are the one who knows yourself best. Of course, there are also nice recurring dreams.
Some people build their own dream world which they explore, meeting friends there etc.
At first, it's up to yourself to believe a reason or another.