What can i do about this, i love/hate my family?

It really sounds like you are the odd one out in your family. Have you talked to anyone about how you feel? You can do this in a way that doesn't attack your cousins or aunt, etc., as long as you explain how upset you're getting and you feel like you are being unfairly treated compared to the others. You can list specific examples of when you feel like you were in a similar position as them but felt like they were treated better. Don't generalize though because it wont sink in that you are being serious about everyday cirstances and you are just upset in the moment. They might be siding with your cousins because they are younger, which is stupid because young children need to know right and wrong. I suspect you might feel better after having explained all this here, and hold on to the idea that one day you will move out and you wont have to be subjected to them. If after you've spoken to them about how you feel, nothing changes, at least you know that you tried to make things better. Find someone to confide in, who can relate. If any of your friends have problems at home, you should talk to them because even if it doesn't change anything, you'll get out your frustrations.