What part of this was dream? If none, I'd say the whole thing was pretty bizarre. A pen writing by itself and seeing things.

My guess is that it was a dream, but did you really get a pen for your birthday or was that part of the dream as well?

This could all mean that it is wish fulfillment. You may be looking for clues about someone's love for you. Have you ever heard the expression "the writing's on the wall?" You are looking for clues to his affection for you.