Romantic tension is one of those things that's often better managed during revisions, because it's all about pacing.
Work with your innate writing process rather than against it, and you'll be much happier and more productive.
In first-person POV, it's challenging to convey who's speaking without a clunky or clichéd paragraph of self-description.
It is so important to be able to play with one's creative work. And the more your livelihood or identity depends on creative production, the harder that gets.
The way you feel isn't a rational response to a defined situation, and can't be evaluated on that basis. Feelings don't stay contained and orderly. Some of your feelings may not even be about your writing.
You're operating by improv theater rules, where as soon as a character introduces a new idea, you say "yes, and" to it. But this theater troupe answers to your direction.
Being blocked on writing that one is obligated to do is something we don't usually think about the way we think about being blocked on creative projects.
The question underneath your question is: "Am I allowed as a commercial writer to do the thing I want to do as an artist?"
Lots of things happen that characters don't know about, or only hear about. That's part of life, and is perfectly fine to include in fiction. Instead of trying to fix it, have your characters react to it.
If you still want to write even after you let go of any feelings of being obligated to write, take some time to think about why. Are there ways to access those motivations and keep them in the front of your mind so you can gain some satisfaction and joy from them?