Can the victim of attempted murder drop the complaint to keep the offender from being prosecuted?
Not really. You were the “victim” but, legally speaking, the crime was not committed against YOU, the crime was committed against “the state.” It’s not a “personal” thing, that’s why it is prosecuted in criminal court instead of as a ‘tort’ in civil court. You can speak to the prosecutor handling the case and indicate your reluctance to assist in the prosecution of the case, perhaps some alternative can be arrived at.