i have watched the episodse more carefully now and rly, the interactions between marco and kelly are rly nothing that special,they are just friendly interactions .and maybe when kelly said : ''you ruin everything anyways'' or something like that ,i think she might have reffered about this relationship with star and not her own fellings ,after all ,kelly was there to witness starco falling apart in starcrushed,so maybe with that line she was referring with things about marco and star . so overall ,personally i dont know why i got so worked up today about those interactions between those 2 . they are nothing serious at all . i kind apologize to myself tbh.