sounds like me a bit as a teenager Lulu. And i turned out ok?................ didn't i??? Ok, so maybe a bit wierd, but no nearly as self centred as i was! My mum was so awsome, and i was still a little biartch, so don't see it as your fault. I too apologised to my mum when i got older.
I agree with the 'ride it out' people. It is a teenage phase where the world revolves only around ME, me, ME, (being the teenager in question) but it will pass. Hang in there.