I gave up on intimacy...

Me m35 and my wife f38 have been together for 15 years. Long story short , my sex drive has always been higher than hers(I could have sex many times per day) , at the beginning she could barely match it (around once every week) , I thought that is ok and was limit satisfied. As the years went by, her sex drive got low , very fast and after she gave birth, almost nothing. My desire toward her never faded , I have always wanted her , find her sexy and attractive. After Years and years of trying to talk to her that I would like more, tried to open her mind but always refused and find me weird to even try stuff, I got upset at our situation(for years)...everything except sex if fantastic. I love her. But the sex situation drained me so much of my energy that I gave up totally on trying to have sex with her, I never mention it again and once every 2-3 months she would feel bad and we have planned sex, vanilla, and I won't feel exited anymore, try to finish ASAP so I can move on. I prefer taking care of myself now. So that's how I gave up, and cannot see that situation get better as we age ! Cheers !