Dreaming of a boyfriend means a yearning for a relationship and coming to a better understanding of the other person. If you are currently single, you may dream of having a boyfriend to hangout or hold hands because you simply want to experience the same boyfriend and girlfriend relationships that other peers have.
If you are already in a relationship, then dreaming of your boyfriend means you want to understand him better and for him to understand you better in hopes of helping a relationship towards a longer term.
Dreaming of a boyfriend is quite positive, and you should work towards this during your waking hours. Go ahead and seek out the person you would like to start a relationship with. Go ahead and get to know your boyfriend for who they are.