Help me

My SO makes me feel terrible about not wanting to have sex with him. Like every time I choose not to. And we have sex a lot but when I decide I'm not up for it at that time. He goes crazy and starts yelling about how I'm not treating him like a person. And how I don't love him. Idk what to do or if this is normal but it makes me feel worthless and that what I want doesn't matter. Help please