Why is that everything I do is WRONG?

Everything goes wrong whatever I do? My cousin is upset with me because I ate all the cheese for dinner. She was like, "See now I can't use it anymore because you ate it all. Ugh never mind. I'm going to start hiding food for now on."
I told her I was sorry and I'll buy more. She didn't answer back. My parents tell me I need to stop eating up the food and I always manipulate people so I don't have do face the consequences. I didn't mean for all this to happen. I know I didn't treat everyone well and cause me my friends and respect. I'm trying to get better but things go wrong. My dad says I better get my act right and stop thinking everything is about me and don't say I did it so I can get out of things.