My ex is stalking me. He's changing my maplestory password and now he's flooding my deviantart.

Someone please. Please help me. It's been almost a year and he won't leave me alone. I don't know if I can go to authorities about this and if I do, how to do that.

I don't know what the hell he wants, if anything other than to make me upset, and I can't live in total paranoia anymore. I'm NOT shutting my life down just to keep out of this idiot's reaches.

Please, help.

edit- Okay whoa, so many responses, thank you so much <3

Just some filling in here- We live many states apart right now so there's only a small chance of meeting face to face again, but I did live with him for 4 years, in which time he learned quite a bit about me.

He threatened me once, as in threatening my life, but it was very thinly veiled and vague, and he never made that mistake again. The problem is this guy isn't an idiot, not completely. He's one of those... high IQ, lots of emotional issues sorts of people... If there is a way to quietly harass someone without showing enough proof to incriminate yourself, he'll find it and he's done so in the past. Not to mention he knows a lot about computers, coding, and illicit internet practices.

My dad said the same thing about going to the police, even just for changing my maplestory password, as it constituted identity theft in some manner. I didn't go for it, because he couldn't get into my account anyway and he was just wasting his time. But finding me on my dA is a little worse, as this is what I use to showcase my talents for employers, friends, and buyers alike.

I HAVE kindly asked him to stop contacting me, several times, and the last time I did so I included the phrase "or I will have to take further legal steps to assure you do". He didn't comply.

So I guess it's time to take it to the cops. Despite the fact that I don't want sticky legal matters, especially with a criminally insane smart guy/pathological liar, I can't keep living in paranoia.

Thanks everyone for your encouragement. I'll be seeing about the local law enforcement at my soonest ability.