dustin finding out that eddie and steve are dating and being supportive!! definitely supportive because two of his favorite people are dating and that’s awesome. but he’s also confused because, like, isn’t steve into girls? confused as he may be, he’s going to support his friends completely.
dustin spotting eddie kissing billy hargrove at eddie’s table in the woods by the school. all dustin wanted was lunch with one of his best friends, and instead he got served a steaming plate of betrayal. how was he going to tell steve that not only was his boyfriend cheating on him, he was also doing it with a total douche!? (no matter how many times max and lucas claim that billy ‘changed’ and that he ‘apologized’, dustin wasn’t convinced. he saw what hargrove did to steve with the plate, he was loyal to steve. unlike some people, appearently.)
dustin mustering up the courage to break the news to steve the next night, preparing himself to see his best friend’s heart break. biking all the way to steve’s house just to see steve and billy kissing in the front doorway. he’s frozen in shock as he watches billy pull away, say something to make steve grin a stupid, dopey grin, and saunter over to his camaro to drive away obnoxiously. dustin gets more exercise in power-biking the rest of the way to steve’s house than he did in a semester of P.E.
dustin yelling at steve for cheating on eddie, yelling that eddie was cheating on him as well, and that they were doing it with the same person! dustin doesn’t know wether to be mad at steve or eddie, and decides to be maddest at billy ‘cause fuck that homewrecker. when he finally stops talking to take a breath he’s overwhelmed and upset but also confused because, of all the emotions he expected to see on steve’s face after his rant, amusement was not one of them.
dustin being sat down and laughed at told that no, steve wasn’t cheating on eddie, and no, eddie wasn’t cheating on him. dustin grasping onto the general idea of billy’s relationship with steve and eddie quickly, and only being upset because they chose to do it with billy hargrove. steve just laughing at him some more.
or, tl;dr dustin discovers the concept of polyamory