Literally how am I supposed to interact with this?

>"cis" bf slinks off to jack off to mtf tf porn 2-3 times a day for hours at a time
>i'm not supposed to know about it, but i am aware because he does it so much and often leaves things open
>has previously mentioned feeling unsatisfied with his gender, yet totally locks up and blocks me out any time i offer to discuss more about it
>the constant focus on himself in this context ends up pissing me off because i end up feeling left out from a part of his life, and sexually ignored most days on top of it, plus i feel like i am sexually not satisfying his needs if he has to constantly seek this stuff out

I don't know how to approach any of it. Telling him I know about it would imply I had been snooping, plus any attempt to ask about and affirm any gendered thoughts he has always turns up negative. I fucking hate gender tf porn as a means of repression because it does nothing to further your thinking on gender beyond just gooning and sexualizing the trans experience for the sake of sexualization. Am I just supposed to ignore this forever? We've lived together for 3 years and this has been consistent, yet there are no other real issues in the relationship.