I'm really embarrassed about bringing up my porn addiction to my therapist

So this is a throwaway for obvious reasons. I've (24m) been seeing my therapist a bit over a year now and she's really great with her job. I feel i learn new techniques and my experiences feel validated.

A big problem in my life that has gone undressed is my porn use. I use it very frequently and I've discovered it back when I was 9. Yeah, 9. It was ingrained in me before I even understood what it was. I understand the difference between it and real life and how it can affect your outlook on other people and I've done my best to be knowledgeable and active of not letting me affect my life in that way, even though I can't really stop.

Anyways, this is something I'm incredibly embarrassed about and dont let most people know about. I know it must be common with people my age, but that doesn't change how I feel. And with my therapist, I don't want to risk potentially changing the dynamic with this topic. She's a good therapist, and I think I've done work to earn some respect in her eyes. If this is something that may change that, I don't want to risk it. Yet this is something that is affecting my life that I want to get control over.