Colin Blunstone's "Say You Don't Mind"

A couple days ago I listened to Colin Blunstone's One Year (on vinyl, even), and I noticed some things about "Say You Don't Mind."  I knew there are melismas during certain parts of the verses, but I found connections with the lyrics that I hadn't noticed before.  The two melismas in question are for "growin'" (E D# C# C#) and "goin'" (E D# C# C# B A, I think) in the lines "I've been doing some growin' / But I'm scared of you goin'."  The melisma for "growin'" sort of indicates the breadth of experience or knowledge that the singer/speaker claims he now has, and the melisma for "goin'" portrays the leaving of the titular "you."  Both encompass a distance in pitch rather than a single note, which would imply staying the same or staying of a stationary sort, respectively.