I do love them in a platonic way more than in a romantic way.
I think Deuce and Riddle have a lot in common, both are aiming to impress their mothers but in different ways Riddle wants to fulfill the expectation of his mother and Deuce wants her to be proud of him.
Riddle is the "perfect" role model that Deuce wants to be but this was impost by his mom discipline, Deuce wants to become one model student by his own decision also..
(spoiler from book 7)
when riddle have a less restrictive mom in his dream he also became kind of a punk so…It is so funny to me that if Riddle have a caring and loving mom like Deuce he would probably end hanging out with delinquent deuce …so yeah I love these two mama's boys dynamic a lot!