struggling to make myself eat, but will if someone gives me food

I have been having this issue for a while. I can't make myself feed myself. There can be food available but cooking it or even just grabbing it is too much and my brain decides it is not worth it. Im also cheap so I refuse to order food all the time. But if someone gives me a plate of food I will eat it so I don't think I am anorexic. A friend with adhd recently admitted to me they are struggling with this too. It is so frustrating and worrying me because I am losing muscle mass and wasting away. I beg my partner to help me by getting me food but they are sick of doing it all the time. But instead I just starve myself....