How do you stop romanticizing someone?

So whenever I am talking to someone I can't stop romanticizing them and our relationship. How can I stop this?

I recently met someone and it's only been 3 days since we've been talking and I've been giggling and shits but I think I romanticize his attitude/characteristics too much & he's face card (he's actually fine FINE but he's too short for me damn) and I heard he was a player/playboy so I want to stop having too much attachment in our conversation/relationship as we are in the same circle of friends (I recently met him because when he was present in hangouts, I was absent lol)