How can I be a better teen? :confused: and not be bad with my parents?
my parents are divored since I was little... and I live with my mom and I want to be a better teen..

I highly doubt you're a "bad teen". Adults live in a world of stress that has nothing to do with your behavior a huge portion of the time. If you want any advice, just be nice to your mom- ask her how her day was, offer to help aroound the house, etc.
Don't be so hard on yourself. You sound like a sensitive young adult- a lot who I know online wouldn't even bother asking themselves that question! Try not to take the ups and downs as far as their moods personally, and focus on the relationships with family and friends who make you happy.
All the best!

Just be helpful, responsible and obey them.

Listen to EVERYTHING she says and do chores without getting asked. Works for me. =)