On the opposite side of this, as a Man with huge libido and lots of quasi-sexual interests. I was married for 47+ years, all of them unfulfilled. I'm 80 now, I have a very sweet but de-sexed girlfriend (menopause. She was wonderful before), & STILL have a lot of sexual drive. My advice: He will never change. Either learn to "live without," reconcile yourself to cheating (NOT good), or divorce and find someone who fits you. I have 4 kids, whom I love dearly, & they were a very big reason I never left my ex & divorced, so my circumstance was different than yours. If you read my posts, my blog, my responses, you'll know that I'm just like you. From my perspective, I made some very bad decisions early on, mostly driven by commitments to my faith, but...if you are a high libido person, driven by your desires, you will eventually crumble under the pressure of your sexual differences and your needs will make you a bitter, angry person. It's taken me years to overcome that and learn to live with myself, so my actual advice is threefold:
1 don't deny who you are.
2. Don't have kids with this partner.
3. Consider leaving, & what it will mean.
Finally, if you wish to DM, please feel free. I won't use your pain to "come on to you," & I may be an "ear" for you to discuss your situation more personally. I aim to be a friend to those like me...