Trying to figure out how to handle this

I'm a very sexual person. I could have sex multiple times a day most days and be completely happy with it. My SO on the other hand says he can go months without it and it doesn't bother him. It's not a testosterone issue because he can be up and ready to go with the smallest activity. But my problem is that I always have to initiate sex. He works 12 hours a day, I know he's tired. I do my best to do things for him. I cook for him if I'm home, I clean, etc. But for once I want him to do the initiating. He makes me feel like he doesn't want me. And that's the worst feeling ever. Our sex is absolutely great. I just don't understand.