Why do you say that the biggest purpose of sharing snacks is to make yourself happy? You are unhappy, why do you want to share snacks with others? To tell the truth, snacks are expensive and cheap, but no matter how expensive, you will find them acceptable after work. But no one's money is blown by the wind. If you don't like your roommate or you don't have a good relationship, there is no need to give them all the snacks. To put it bluntly, a roommate is a neighbor who lives with you. You can choose to get along well with your neighbors, give and take, or go out independently. I always thought it was wrong to treat my roommate as my best friend. When you get to college, you will find that roommates have their own circles, and there are also circles among roommates. Don't expect too much to circle with snacks.
Don't kidnap morality with meanness here. After all, money and snacks are all your own things. Divide if you want, or divide if you don't want. Of course, if other students give you snacks, it is necessary to give them back appropriately. If you don't want to give others snacks, don't accept them.
Let's introduce the 50-50 principle again. We just said the 50-50 principle is five for you and five for me. I've had this embarrassing thing before. For example, a box of snacks contains only 10 buns, which are distributed to eight people. Then even if it's my share, I only have three, so I will feel not enough to eat at all, and I will feel very lonely. If there are five left, I will find it acceptable. So it is not necessary for everyone to share things, but if you don't want to share with one person, you'd better not share snacks in front of him. Because it will give people a feeling of being targeted.
Although snacks are not very expensive, we are poor as a student party. So remember one principle. Share snacks if they make you happy. If they cannot make you happy, don't share them. Just don't eat in front of them.