You create relationships with any of the four people in the game. In addition, you can ask everyone about almost everything.
I'm just testing what I can do in Quest, as this is my first game.
Ask interests about "love" to get a general hint on how far you are in the relationship with them.
You are not logged in.
If you log in before playing, you'll be able to save your progress - which means you can come back later and pick up where you left off.