What does "get away from you" mean in this context?
Below is a line from the TV show, The Good Place. There's this guy who really loves frog and people kept giving him all sorts of frog related stuffs (frog dolls, badges etc.) Now his desk hardly has any space left because it's all filled with frog items, and one day his friend comes to see him and says,
"Boy, kind of **getting away from you here, huh?**"
(The frog guy answers, a little hesitant but still smiling, "Yeah, I love frogs though, so it's awesome.")
What does the part marked in stars mean in this context? I looked up the definition of "get away from" but none of them seems to fit. Also, what's the subject of the sentence? (What) got away from the frog guy, is he asking?
Thanks in advance for your answer!