Hi Frankz! (Oh, and please say "Hi!" for me to Sunny, your high maintenance rabbit who has the nerve to beg for treats - Sunny must know our mutant shepherd...)

Reading your post I'm struck by the dysfunctional environment that imposes on you tasks and stresses a young person ideally should not have to face. I would be surprised if you and everyone else in your home did not act in ways that express the dysfunction surrounding you. The bad behaviors you see in yourself don't exist in a vacuum. Sure, you could work to improve your relations with your sister and mom, but the larger matrix of problems is going to make your "self-improvement" efforts exceptionally difficult. Your whole family needs help.

The above suggestions to seek counseling are sound, realizing your options are limited. A school counselor (or nurse) is probably your first stop. Try to resist the temptation to demonize yourself. Anyone to whom you speak needs to know the larger picture of your family.

I wish you the best, Frankz!