how do you deal with idealization, when you have totally idealized someone, and are just always thinking about them, extremely wonderful thoughts, when you know in reality they are human just like anyone else?

i've idealized several people in the past, only to find them completely devalued. the person ive idealized right now, i don't even interact with that much anymore, but i'd just like to stop obsessing. any advice on this would be great thanks.

ive heard i should get to know the idealized persons in a group setting, like just getting to know them better to see their flaws, etc., however im not able to do this at this time... and i just can't seem to break the "perfect" picture i have of them. even the flaws im aware that they have are just very attractive.