I need help...

So I’ve liked this guy for a long time now and about three months ago we told each other that we liked each other. And last week I asked him out on a date. And his exact words were, “Yes, of course I would.” So we planned it out and we are going to go out. But for the past few days I just can’t get him out of my head. Like he’s all I ever think about. I feel like that’s a problem, like I’m being really clingy and annoying. So I just wanna know if there is anything I can do or anything I can say to him that will get my mind off of him for just a sec. Or if this is normal and I’m just being dramatic.