He's just not interested?

When we first began dating 3 years ago, my boyfriend was excited by my sex drive. I know I rock his world in the sheets, and he knows I always want it. So why don't I get it anymore? Why when I ask if he wants to watch a movie or eat, does he always choose eat?
I can't help but suspect it's self-esteem. 
In contrast, I've got a fwb who could give a shit if I cum or not, and does me any time, any day, as much as he can. Sadly, this dude is not as satisfying or interesting and I still feel hurt that my boyfriend shows zero interest in me. Have you dealt with this before? 

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