My question involves criminal law for the state of: california
me and my boyfriend were involved in a robbery case where i was cheating on my bf and going to meet a guy for sex and he was going to pay me and when we decided to meet for the first time i didn't want and changed my mind and tried to leave but the guy was groping me and stuff my boy happen to walk by because we had plans to meet later on and my boyfriend didn't know the area well and he went early and say us he didnt know it was me at first but realized it was me and started fighting with the guy and my bf knife fell out and my bf grabbed it and the other guy grabbed it saying no ill pay you please dont hurt me but my bf never asked for money the guy willing handed it over and walked away i was not involved but im being charged with sencond degree robbery PENAL CODE SECTION 211-212.5(C) and they think we set him up i am a juvenile and I need help my bf already got charged and sentenced with it and a knife enchancement any advice as to what I can do? i have court april 1st for a formal reading of petition , advisement of rights and plea what usaully happens at thos?