From what I've read about it (I've only played the demo), it's not a dating sim. There are similarities throughout the game but it does not revolve around your relationship. For the most part, the game is spent investigating logs from a lost ship (
the review PlayerReview linked explains a bit of the story), interacting with the command line to guide you though the logs, and talking with the AI on the ship. Dialogue mostly involves the AI explaining parts of the logs and sharing their thoughts. It's not a dating sim. If you get a chance to try the
demo, it's pretty short, but summarizes the gameplay pretty well.