Looks like a lot of her behavior went over you guy's head ... if you read between the lines yes she's lesbian and she really wanted to spend more time with MC (the "joke" at the end). Also it's pretty clear she has either Savant or Autistic syndrome.
Are Japanese men taught that girls are bad or what? At this point almost every godamn Japanese MC seems like a limp dick mofo who can't even handle girls throwing them at him. Like they have some kind of girl allergy.
Why does it feel like Riku's world revolves around Takt? Why does Takt have him by the balls in everything he does?? TAKT TAKT TAKT bro c'mon, if you are gay/bi deal with it and go out with Takt!