Is your man ever sexually selfish?

I've noticed for a while that my significant other only wanted oral sex. As endearing as it is to know that he likes it that much, it makes me feel unappreciated and kicked to the side. As if he would rather me do all the work while he gets gratification instead of making each other feel amazing. And to test my theory I stopped pleasing him sexually. Saying that I'm too tired or any other bs excuse because I was fed up. Guess who hasn't had sex in almost 3 weeks? He hasn't even attempted to make a pass at me. Which is just a stab at my self esteem. Any advice ladies?