Horribly naive and delusional? Yes.

Shane kind of nailed it in saying that after dating, wining/dining, and going through a whole wedding that he should just be okay with her not being pissed at him. Like, dude is an asshole across the board, but he was very rarely WRONG in the show.

I don't know that Rachel is a bad person - I DO think Paula and Olivia treated her super poorly for no reason - but I also don't think she's the most sympathetic of characters either. She's in it for herself as much as any of the other characters are - hell, she treated Belinda poorly in their last scene together.