I have a friend who's created a fairly popular comic and she says that there's times she wishes she hadn't watered down a character due to the fact that she catered to the younger fans. Her story was never meant to be as friendly for younger readers since the topics and things in the comic are a bit more for mature readers. (That's not to say that younger readers can't read it due to the fact that it's not all mature topics and there's a lot of humor and some slice of life type episodes, but there is definitely a certain maturity level that benefits from her comic.) However, that being said, the romance part of her comic between the two characters is def slow burn and it's not even clear if there will be any kind of canon official thing between them. That's something she hasn't faltered on and I'm thankful, as a reader, that she hasn't.
I'd rather a creator be able to tell the story they want to. While the story might please others if you let the whims of the readers guide you, your story and content will show that you aren't enjoying it as much as if you continued to tell the story in the way you want. I know my comic is going to be told how I'm planning it, and sure there might be a couple things a person may say that might wind up being a better path than my original plans, but I have a fairly good direction I'd like to lead the plot.
I think with things like romance, it needs to be told at the pace that's right for the characters interacting. I think a few suggestions of having it be like an "Omake" or just a side comic that has nothing to do with the plot would be a good and happy medium area for you to indulge in what readers want without taking your comic in a direction you weren't intending.