Nah, that's just ridiculous, especially since, as I said, a lot of the underlying relationship stuff comes from way back when Loki, Thor, Balder, Sif, et al. were children. The movie clearly couldn't have hoped to cover these people's entire lives and deliver a big action movie and show us how Thor gets to Earth and have the romance subplot and tie it all into SHIELD and the Avengers. You'd need like 4 or 5 hours and the most patient audience in the universe for that.
But it probably will piss me off if the upcoming animated Thor: Tales of Asgard movie doesn't cover some of that. I mean, it's a movie about Thor as a teenager, so it's kind of the perfect venue for exploring those earlier relationships.