AITA Because My Boyfriend wanted to order only me food but my sister wants food too?

My boyfriend orders me food to be nice sometimes and just cause he wants to. When there’s no food he’ll get us groceries. When there is food I’ll ask him for something or he’ll offer cause i do tend to starve myself out of mental stress. When my mom grocery shop, she doesn’t really buy ingredients that makes me excited to cook and work with to be healthy. My sister can cook for herself and when she doesn’t feel like it she’ll ask me to cook but tell me what to not add or do because of her diabetes. I like to add flavor in my food and when she told me to not add too much seasoning the food tasted bland to me and my mom (who is also diabetic). I get tired of eating like I’m diabetic and cant enjoy food anymore that’s home cooked. Even if i cook for myself its a problem. "Why didnt you cook for me? I need to eat too." With a small check or an art commission and theres no food in the house, she expects me to spend it on doordash automatically. My boyfriend gets annoyed of doordashing when it cant just be a nice gesture for just me cause he is very kind and giving. So whenever he offers me food and my sister goes "what about me" he gets annoyed. When ever im on my cycle and he offers me snacks its the same thing with her. My mom is no help when it comes to my sister. Me and my sister are both 22 years old, i’ve worked a job in my life and is also streaming to try and keep up with money. My sister hasnt worked a job and is also working with art commissions just not a lot. Whenever she asks my boyfriend for money or includes herself to my boyfriend trying to be nice and romantic with me it sucks. It’s already stressful enough whenever my friends and her friends tell me i need to move away from family. But my sister wants to move with me and my boyfriend and asked "is she gonna third wheel"… So am I the asshole or just have a very depending sister?