Cara Delevingne hit up the Super Bowl, but forget the game -- she was all about some quality buddy time with Machine Gun Kelly. Check out this vid -- Cara and MGK were kicking it on the suites ...

but he was also seen hanging out with another old pal - Cara Delevingne. TMZ obtained video of the pals strolling past various suites at the Caesars Superdome in New Orleans alongside Cara's ...