Wow, you guys have a very different impression than I do.
Really? I'd like to hear your interpretation. exchanging thoughts on a story is fun, as long as it's an honest exchange, and not just someone telling you you're wrong and insulting your intelligence for thinking that way.
What I got is that Yuka is in love with Haru, but is very closed off and have a hard time expressing genuine affection so she confesses in a roundabout way and tries to get Haru to make the first move. Is she a bitch? Kinda, but I don't think she's playing Haru or using her.