No, it's not that you are stingy, but that it does take advantage of you. Your roommate uses more and you use less, but in the end, you have to share it equally. The solution is, you can fight with him, just discuss with him that you also want to cook and cook together, and see if you can buy food and eat together. I can't make it clear to anyone. I think your utilities are too much. Will he not know that he has taken advantage of you? Of course, I know. How can you talk to others and offend others? Of course, others will call you stingy, and it's not nice to spread it. Let's make a detour to solve it.