Harry was simply trying to get Remus to go back to Tonks. I think Remus worked that out later, and he sorta 'apologised' for his silliness by asking Harry to be godfather.
I also saw Remus as next in the line of 'Harry father figures'. After Sirius, then Dumbledore, I thought Remus was next in the line. That's pretty much why I predicted his death before this book came out. I sorta knew Harry had to be left totally 'parentless' (well other than the Weasleys, but they're inlaws anyway).
Still, I don't think HArry was ever REALLY angry at Remus.
asy