You don't have to apologize for your interests. These games are fantasy, specifically designed to accommodate unique interests. However, I didn't write any of the characters as you're describing them. Bliss hasn't expressed that much interest in Rose, or anyone else except for Chester. So much so that she's seducing Nixie into a relationship with Chester because she wants him to have unrelenting pleasure and affection. Petal is the same way. Petal's main motivation is pleasing Chester, because she herself derives a lot of pleasure from making him happy. All of the characters are devoted to the main character, but that doesn't mean there isn't friendship and love between the girls.
I understand what you're saying though. I've heard it a few times now. It doesn't feel like Chester is focused on enough, and a few people have voiced this concern. This story is set for how it's going to be. Everything revolves around Chester, but he's not always involved with everything that's going on. I felt this was one of his strengths. He has the maturity to know when to step away from situations to let them breathe. When Bliss interacts with Nixie in the pool, he's letting them have some time together. He doesn't need to be in the spotlight at all times. And that's a robust and independent attribute.
Again though, a lot of people feel the same way. Chester is growing and becoming a more dominant person. He's starting to take control of his own destiny more and more. Right now, a lot of things are happening to him and not because of him. That will change over the course of the story as he develops more as a character. You gotta give that time though.