Accidental manslaughter definitely.
You can overcome guilt, rationalize it, move on with your life and eventually stop thinking about it.
You dont just suddenly stop being attracted to something for no reason, so option 2 is to live with it all day every day.
I saq a Reddit ama by someone who's lived option b. Early 20's & fearful of seeking professional help due to "mandatory reporting". He forced himself into an isolated life not unlike solitary confinement to avoid harm. After reading his story i'd take accidental manslaughter.
He was acutely aware of what was wrong with his desires. Didn't look at the relevant porn to avoid being part of the "demand". wanted to be chemically castrated and live a half normal life. But offender or not had concerns about incarceration due to the act of seeking help.