Buy a object like a lamp that has 3 prongs and exposed metal. Before you pet your dog touch the lamp. 3 prongs so thats it’s grounded.
Also when you touch your dog for the first time touch him on his body with you whole hand at once, it’ll spread the shock over a larger area and be less painful.
Try and flip the fantasies on their head.
Try looking for odd quirks and mannerisms that bother you and imagine how annoying it would be to be with a partner that does those things all the time.
Look for the particular ways they want to be cared for in the manner and how you would not be suitable to meet them, and that they might be happier with someone else.
Also just spend more time with them, and the infatuation will either fade or you’ll realize you do really like them, which is OK, let them know, and it’s OK if it’s not reciprocal (though this is actually quite hard as a lot of women are conditioned to not believe men who say this).