Lawyer up, hit the gym (could come in handy if you get put in jail, no matter what the charges are), don't delete Facebook, like Tragic-story said, you want to prove you two were in some type of relationship. If the police ask you anything, invoke your right to counsel, do nothing else.
Imagine if every mother who had their son circumcised all of the sudden undergone a circumcision themselves. The barbaric practice would finally be illegal.