Kai and you love each other and you always celebrate your birthday or even special days with him but one day you introduce him to your best friend...

Kai was starting to get close to your best friend it made you think they have 'more than just friends' relationship

You are walking towards a restaurant because you have a work related meeting but you saw Kai with your best friend...he is laughing and talking with her

"oh I never love her in the first place"