I'm quite sure I am over thinking this one... But remember that 1.9 battle areana they did in ships.
Well, Jerome named his POV (He said and I quote) I SHIP MEROME Minecraft 1.9 Battle Areana
Ship, in the urban dictionary has been known to be related to a romantic relationship. (And in the Dan Howell dictionary known as Liking the idea of two people being in a relationship)
Jerome wants to be in a romantic relationship with Mitch, confirmed? (Okay this sounded better in my head. XD )