Depressed and dont know what to do?

No - you are not immature. I mean you could be feeling more low at certain times of the month and if thats the case you need to speak to your doc about remedies for hormones. But that aside - you sound you have had a terrible time. DO NOT let what your parents have done ruin your future. Your parents decided to divorce - they are adults - you are still a young girl! They are immature if they blame you for there screw ups. Sounds to me like you are a scape goat for them. You must talk to someone - can you speak to a doctor or someone from the church you attend. And remember - you know you are doing things that are not right and you want to change - so you will! it takes time and you may feel its not through the church you can do this - you need to explore lots of avenues. Chin up - you sound like a well balanced girl to me - just got lost in other peoples rubbish - just dont let that become your rubbish! xx