I don't think the Doctor was having problems with meeting someone out of sequence (he deals with it easily enough at the end of _Blink_). I think what confused him at first was the intimate way River talked to him and then he got in denial over the idea that he'll have that sort of relationship in his future.
(no subject)
Date: 2008-06-01 05:29 pm (UTC)Other than that: yes, everything you said.
Ana (here via Doctor Who Daily)