I'm implementing more agency as the story progresses as part of the MC's character growth. You'll be able to reject Nixie and Suzi as love interests. You won't be able to turn away Petal, Bliss, and Rose though. It wouldn't work for the plot if you did. There will also be some other options opening up as the story progresses.
Agency is tricky. It adds a considerable amount of work. The more deviation availability, the more work. If I had a team, this would be much more feasible. So I'm trying to work within the constraints of my current business setup. It's tricky, but I'm confident I can add enough agency to make the game even more enjoyable.