I think the quote you used shows exactly why Luke and Rory will never hook up....How many times has Rory already dissapointed Luke??
The answer is...more than I can't remember From seeing Aaron after he found out what happened to secretly inviting him to Ricks partyand then pretending he didn't know what he was doing there( ok, I made that part up, but my imagination was running wild ), Rory is always dissapointing Luke and Luke deserves someone better, someone with experience and aged like a fine wine...hmm, I wonder who that could be....
LGAITE's for LIFE!!!!!!!