mad because i won’t have sex with him

So i’ve been at work since this evening and my legs are killing me. My boyfriend and I have had sex twice today and i’m not this biggest fan of sex but he loves it so i still have sex with him anyways. I just get NO pleasure whatsoever from it. So i got home and he wants to have sex but i don’t bc my legs hurt and now he has an attitude with me. He wants sex every single day, multiple times, and i don’t but i still do it because he just gets in a bad mood when i don’t. Like this ain’t okay, right? He don’t see anything wrong and tells me i should want to please him but it ain’t even that, i’m just exhausted. I was almost even late for work earlier because of him and his need of sex.