To take this in a slightly different direction:
1. You say your work is fast paced. Here's something strange but fascinating: chapters actually help speed up the pace. Ever had that feeling as a reader of "Just one more chapter?" Well when we know the end of the chapter is in sight we kind of read almost faster, getting there, and then. . . well . . . then we want to read the next one. Because, it's not that long and we're so into the story and want to keep reading. Want to really take advantage of the fast pacing affect of chapters? Go full Dan Brown and end them on cliffhangers. That makes people want to turn the pages even more (but don't do it every chapter because then it can get tedious).
No breaks, no chapters, makes a book feel longer. It becomes a marathon as opposed to a series of manageable sprints. People think more about "When do I get to stop reading thing" as opposed to "I just want to keep going a bit longer".
2. You might not care about this, but it is something I do personally. Reluctant readers need chapter breaks. I myself am a reluctant reader and can speak from experience. A chapter gives the reluctant reader a sense of accomplishment. It makes the task of reading seem less daunting. Less overwhelming. Now no writer is obligated to write for the reluctant reader, but it's always a nice added bonus when a writer does take us into consideration, especially when it comes to younger readers.
All this said, if you truly feel like your work needs no chapter breaks then that can work too. But make sure you make an informed decision. Understand the benefits of chapters, and also the challenges you face in selling a work that doesn't have them. If you are sure no chapters is what suits your story best, then go for it, but make choices based on knowledge not ignorance.