Sasa's Favorite

I think he needs to see a Psychiatrist. With his obsessive and dependent tendency towards Kyungsoo. Maybe it all comes back to his family. I don't think he grew up in a loving family (not that there is an emphasis on that) so he might not be familiar with affection and he didn't know how to handle and show it properly. Or maybe just like he said about his mother maybe he is afraid that one day suddenly Kyungsoo will leave him so before that happens he break him?