No longer interested

I love my husband, but these past few years I haven't been wanting to have sex. When we first got together do to some medicine he was on he wasn't as thrilled to have sex, and now it seems as though the tables have turned. I not on any meds but I just don't have the same drive anymore and I feel like a horrible wife. He has told me on several occasions that I treat sex now like a "job/work". I'm not as spontaneous and as fun anymore. But I work it seems like everyday. He is disabled so he doesn't work, but gets an income, but I feel as I do EVERYTHING on my own...I'm just hurt and stressed and overwhelmed. But instead of understanding I get shit. What is there to do??