I currently had a friend of mine fill out my fafsa for student aid. Well we currently are not in good standings and she is now using my social security and other information against me by messing up all my fafsa and student aid transcripts. There is basically no way to stop this because I have changed my pins and passwords but knowing that she has all my important information she can still obtain any information about my student aid or change stuff to affect my student aid. What can I do to stop this?

To access your FAFSA information requires a PIN. If you request a new pin it will be sent to the e-mail or street address you have on record. So you should be able to prevent access by changing the PIN.

As for your student aid info, inform the student aid office and the lender for your student loans of the situation, ask that additional security be placed on your account to prevent any changes.

Yes and if she has done any illegal change of your items report it to the police, ID theft is illegal