Is it normal i keep a crush in my head only?

I hooked up with this guy as a one night stand thinking whatever this is only fun of course but after that night we started texting for a little bit. I was doing this thing where ok I guess I was playing hard to get but its weird because I thought he was cute yet i was acting like oh Im too busy for you or something and Id knock myself in the head like hello hes cute and if i miss out its all gonna be my fault. I came to the conclusion that he intimidates me. So if he would ask me to go out I would say no because Im afraid Imma blow it cause hes so up there like on a different level I assume since I dont know him at all just that one night we made out but nothing else since also I was avoiding him in texting cause Im scared imma make a fool out of myself. I decided well, if I think hes cute and its kinda like a crush (I believe its a crush cause I miss that night with him), Ill just keep him in my head as the guy I wish he was which he is probably not. Theres that saying where that person you like is only the person in your head not who they really are and i think thats whats going on here which I rather have it that way since like i said before, im afraid if we really do go out, Im gonna blow it. So ill just keep him to myself all in my head.