I bet my left asscheek Jackie shows up next season and Marco apologizes for neglecting her. The show has a social circle. Jackie is friends with Janna, Janna is friends with Star, and Star is Marco's best friend. The characters cannot avoid each other completely, and the "still friends" mantra is uttered no matter the circumstances to keep relationships intact.
Just rewatch the season 3 finale and see how casual Hekapoo is around Marco after she bitched at him, and how Tom saved Marco after confessing to kissing his girlfriend. No character is completely dead to another character. The only exception is if they are actually dead for good.