If I recant due to personally safety with that charge be dropped if I am the only witness, and will my name be released to the defendant if I recant

There isn't enough information here to answer the question. Sometimes, recanting will lead to the charges being dismissed. Sometimes, it won't.  If you're in court, the best course of action is to tell the truth at all times regarding what happened. If there are specific facts and circumstances that require a consultation, then you should contact an attorney.