I've always said Spencer is just as bad as the cretins he hangs out with. He would have been used to doing the dumping not being the one dumped, so that would have bruised his ego big time!
I don't know how he didn't think it would get out when he's friends with Carmie, the guy who thinks it's funny to drop his mates in it & probably the mastermind behind it. Spencer's always made it clear he doesn't like Lewys so of course he would tell Oliva what Spencer did. As for Millie "I hang out with guys cos they're less drama" T, she should maybe have looked at it from a girls perspective & told them not to. The lot of them need to grow up