Why do I keep having these dreams?

I keep having dreams that I tell my crush how I feel about him, but he already knows that. Last night I had a dream that I told him but his face was kind of a mix between himself and this actor named Logan Lerman LOL. But a lot of other times I have dreams that I see him again in the new school year (8th grade). But when I tell him in my dreams he's shocked but in real life he really wasn't. He already knows but why do I keep dreaming of it???