Dreaming a nightmare

So lasnight I had...a very hellish dream. I dreamed I was cheating on my boyfriend. It was so wierd, I couldn't read his eyes when he had walked into that white-walled room. I only saw his face turn and twist into this tormented scowl. It frightens me. Scarred me. It's changing me. I'm afraid of myself and the hurt I could cause. I just want to be with him forever, and then I dream this? What kind of monster am I?