Yes, I do not want to be overhasty either, and this is very psychological, but it got my thoughts to racing. In addition to my other remarks: I had noticed in pictures and video footage (the one she appeared in for the band) that Meredith had very alluring and deep eyes. I can picture a lost guy like Rudy, coming from a brutal past, and longing for his "Momma", reading TOO much into Meredith's sweet eyes, and her kind voice and friendly remarks. He may have believed he had at long last "found the one true Beloved".
It is VERY telling that you noticed his mentioning of "waiting". This sounds like a person SEIZED with excitement, as in the delusion that Meredith loved him. Also, it is telling that when he speaks of Meredith bleeding, he reverts back to his father smashing a stick over his own head and causing copious blood. The pain of rejection from Meredith brought out rage at his own father from boyhood.
Also, he puts into Meredith's mouth the words "please don't leave me"--but these were likely his OWN feelings. And perhaps he thought, "OH--I thought I was about to embark on the love of my life---she tells me now I am unwanted, nothing----so I revert back to the "Bad Rudy", who is only a burglar, only after $$$, so I better go break the window to fit in with my OWN MO---I was NOT a lover, I was only a robber. THIS could be why he "faked his OWN MO" with the rock and the window!!!:waitasec::waitasec::waitasec: