the problem with characters talking like they're in a therapy handbook isn't, of course, that they're talking about their feelings - it's good to have characters talk (and fight) about how they feel about each other. the problem is how generic and boring it is to have them use the current Right Terminology - isn't it more fun to have characters have all these feelings but not know what to call them? for them to look for the words to express them, and not find them, at least not neatly?
and besides, all these terms are, to use a food term, concentrates. But I don't want the concentrate when characters have a fight about their emotions - I want the full-bodied juice.
"I brought you a bee cake. You've always loved bees."
"I brought you a bee cake. You've always loved bees."
"I've never loved bees! You decided I liked bees. It's the same thing as always. You won't let me choose what I like, you just tell me and expect me to believe it."
The shorter response can do a lot, in specific circumstances, but by taking the shorthand away, so much more space for character is created.