thought i would give it a try..
Maybe there are 2 ways of interpreting your dream. On one hand as being predictive. On the other hand your dream could have been telling you how to 'behave'.
You kissed the guy who works next door to where you work. I'm guessing you are a female? So, female works next door to male or: emotions working next door to the rational. You kissing him then, to me, feels like: trying to form a bond, working together. Linking this to what happened to you the next irl: you didn't let your feelings lead you, but used common sense. So in this way i think you shouldn't feel too bad about yourself.