I share a room with my older sister and we dont always get a long and i had worked so hard cleaning my side of the room for maybe a week or two but it seems like she does not care because she made her stuff a mess all the way to my side of the room it upsets me a lot. What should i do?

Oh I have the same issue with my sister about the room.
First try to talk to her about the problem
Second if she doesn’t respond tell her that you can help her with cleaning
Third if she also continues tell her that you are going out of the room and get another one
Finally if she still for me it’s better to find another room, but if you can’t (like me) don’t talk to her even if she talks to you and if she asks you why you don’t reply say that you also don’t react when I ask you to clean up your side from the room
I think then she will be better
Tip if your parents are near tell them about the problem
I hope everything will go well ✨✨
Good luck 🍀
I know you can do it 🌸 🌺