I don't think you can blame yourself Rose...you couldn't have feasibly known this was going to happen. You can't blame yourself for the actions of another person. I'd submit to you anyone who thinks it is a good idea to change their name to Vlad Diablo Impaler (Vlad and Impaler from Vlad Tepes Dracul III, aka "Vlad the Impaler," one of history's cruelest rulers and Diablo meaning devil...really?

) is very much a sick puppy. You can't hold yourself responsible for his actions anymore than you can for his..."charming"...taste in names. He is the one who is sick here. Not you.
I don't think your parents didn't act because they didn't care Rose. I think, in a way, they never pressed charges for statutory out of concern, odd as that may seem now. To have your personal life dredged up in court, be it out of disdain for him or to get you out of that situation, is very difficult to deal with in and of itself. I think that particular failure to act was simply out of them not knowing
how to act. I do think that they should've done something, sure, but I don't think it's that they don't love you.
Don't let it snowball Rose. Certainly don't let it get you down to the point of suicidal thoughts. Suicide only cheats yourself out of the opportunity for things to get better, you know? I would advise you to seek a therapist if you feel like you're having those thoughts. They can help deal with the emotions lingering from this, and help you overcome them.
Please know you are in my prayers, and I wish you nothing but my best.
Sincerely,
Harley