My Fiancés gym schedule ruining our sex life

So, my fiance and I have been living together for 1.5 years, we are set to get married next year. The first 10 months of us living together was amazing, our sex life was great. I have a super high sex drive, his is a bit lower. We would have sex 2 maybe 3 times a week which worked well for us and kept us both very happy. Now, my fiance and I got gym memberships together about 8 months ago. I go less than he does as I am currently 7 months pregnant but I still go 3 to 4 times a week. He goes 6 or even 7 days a week and comes home exhausted and usually just goes right to bed after. Now, its been normal for us to go two weeks or even longer without sex and I am so frustrated. No matter how many times I try to talk to him about it nothing changes. He tells me that if I give him oral it will help get him in the mood but when I ask him to go shower after the gym he refuses and says he only likes showering in the morning... like? I'm sorry but you want me to give you oral to get you in the mood for sex but you won't shower first after spending an hour to an hour and a half at the gym? Thats not happening. I just dont know what to do anymore. I have toys of course and I use them regularly but it just isn't the same and I can never get myself to orgasm like he can get me to (I swear he is magic lol).