Ok, this goes way outside my comfort zone but I do have a few ideas.
Why do you masturbate? The idea of a sex drive active even when you don't want it to be is quite scary. As an ex-addict to masturbation myself, i do have some tricks.
1: Why do you feel guilty? Focus on that. Finds some way you can be reminded of that. I myself felt guilty because it got in the way of my feminine side. As a bigender, that affected me. I reminded myself of this constantly-there's an idol of mine, Kim Petras, that was invaluable in stopping the addiction. As a matter of fact, I have one of her youtube videos open in another window right now. A constant reminder.
2: Repressed desires. Forgive me if I'm leaping back into my comfort zone, but as soon as I typed 'why' those two words entered my head. I stopped masturbating, well, started the process of stopping masturbating, as soon as I realized, identified with, and accepted my sexual orientation. While I was masturbating, I thought of myself as a heterosexual male. Now I'm more of a bisexual transwoman, and with that change my masturbation issues subsided a lot.