Partner has lost interest.

Hi there. My fiance, also a woman has never been an incredibly sexual person, however, she did the deed with no complaints. Now, she works so much that by the time she gets home she wants nothing to do with touching me in any way.

We both work full time management jobs, but I will never turn down sex no matter how tired. I'm indescribably attracted to her, and constantly want it. Shes AMAZING in bed.

How do I handle this, she knows I want it, but just doesnt want to put in any effort.

I've tried almost everything under the sun, nudes, sexts, coming onto her, everything. What do I do??? We are madly in love, but this is just really hard for me and making me incredibly self conscious about myself. Help!!! TIA.