I feel like such a horrible burden to the people around me.

I am currently just crying. I feel like such a burden on my partner. And everyone in my life. I'm useless. I can't function anymore. I can't work. I can't clean. I can barely cook. I can't go grocery shopping, best I can do is order it online and pick it up to save money. And yet no money is being saved. I drive my partner to and from work, and try to run errands during the day if I can stand it. I take care of our animals at home, and I cook dinner when he feels up to eating. But, it doesn't feel like enough. I do what I can. My partner works a full time, hourly wage job at a smoke shop. $16/hr, 40 hours a week. He makes probably $450 a week on average. Which, isn't bad, given our situation. And yet, somehow, almost all of his money goes to me. And I feel fucking terrible. I just spent less than $100 on things I needed from the store. Just food things, and a small personal blender. I've been having a really hard time with solid food due to severe, chronic GI disorders, and I'm switching to a mostly liquid/smoothie diet to see if it helps. So a $20 personal blender, some fruits, frozen and fresh, a bag of pretzel chips (the only safe food I have) a box of liquid IV, ginger paste, a mio, matcha powder, and peanut butter. That's it. It probably all came out to about $35 total. Maybe less. And the rest of it is things he wanted. Most of it is things he wanted. And yet, I scrolled the cart up and down for ten minutes just trying to decide if I could stand to lose some of these things to make it cheaper, and spend less money. And there wasn't anything. I hit order, and just started crying. I hate it. I hate feeling like this. Like I just suck resources out of people for nothing in return. Because I have nothing to give. I have no money. I can't contribute anything to this. And I want to so desperately that it physically hurts. How do I stop feeling like such a burden? What can I do to feel useful to my partner, and the people I live with? I feel like I'm gonna lose my mind.