I really really hope this isn't going down the relationship route.
What I'd like to see is upon Marco's return, Star completely ignores Tom again, to the point where he confronts her about being a bad friend.
But what I'm guessing is going to happen is that Marco returns to see Star and Tom have a thing, feel hurt, and bugger off to Hekapoo given one of the upcoming episodes is Star finding out they've been doing stuff together.
Once She finds out, it will bring back jealous Star, and then Marco will get mad because he came back for her, and then anger and argument and then "get over it and just kiss already" yadayada.
I want Starco to happen damnit but it's gotta be satisfying when it does.