Depends. In the first Thor movie, it's made pretty obvious that Thor's friends treat him like crap and take shots at him when Thor isn't around. They don't go into intense depth, but it's a very fine line. His slights were his BROTHER is concerned are largely imagined... everyone else is another matter entirely.
This is true. Thor loved the hell out of his brother and never considered him anything but his close friend, family, and equal. It was obvious that Thor's pals did not like Loki nearly so much and he also didn't seem as popular in general.
But Loki did have a jealous streak a few AU wide and took everything extremely personally and did exaggerate every slight against him 'til the slightest perceived snub was treated like a war crime.
I have no idea how he got the idea that Thor held him in anything but the highest esteem though. Thor very obviously refused to listen to anyone who would say the slightest bad thing about Loki and had to have Loki's betrayal damn near kill him before he believed it.