Help me get over a boy

I met a guy a year ago, I didn't even kiss him. He clearly wasn't in to me so I cut all contact with him to try and just forget about him. I've been with guys since, even on a steady basis. Just one year later I still can't stop thinking about this guy I met once. Please, somebody tell me what to do to get over this guy! I haven't been in contact, ive been under somebody else... What do I do? I feel like such an idiot even writing this but how do I let go of the idea of the perfect guy