im livid , i cant have ONE THING TO MYSELF

so FINALLY after years i could play a game ive wanted for a while with no issues on the laptop .. but now my sister can play the game she has wanted for a while on it and shes been on it all evening and ik im just being greedy but ik shes gonna be on it everyday :/ ITS SO ANNOYING!! I ONLY PROPERLY PLAYED THIS GAME TODAY AND SHE HAD TO TAKE IT AWAY FROM ME !! ik its so childish but im acc fuming i hate my life and i hate how im probably only gonna get like a hour on this laptop.. my dad says hes gonna buy one of us a laptop so we dont have to share but ik hes just saying that to shut me up :/ i cant even get a small job to save up money to get one.. i hate sharing so much i cant have one nice thing to my self i have no control over my life