Dealing with Frustration in an Autistic Friendship

so my best friend is autistic and I love them, but I'm starting to get annoyed with them when they get frustrated easily with things. I know they can't help that they have a hard time processing emotions, but I feel like I'm giving a lot of my time and energy to make them feel better and it's starting to take it's toll on me. I feel like I am always giving in to what they want so that they aren't frustrated anymore. Like for example, we are figuring out what we want to eat (they alway want me to pick what we do), and if I say something that I want and they don't want that, they get upset and say "I'm not hungry anymore". I don't know what to do, because I'm worried that if I tell them I I'm feeling, they will respond with "You hate me, I'm a terrible person, I should just unalive myself" which also makes me frustrated when they do that. I'm also getting tired of them complaining about things that are physically wrong with them like "my stomach hurts, my head hurts, my back hurts, I just passed out, something is wrong with me." and I tell them to go to the doctor and then they say "I don't like going to the doctors" sometimes I think they are exaggerating their pain and pretending to pass out to get some kind of reaction out of me. Anyway, I don't know what to do 😮‍💨