I've got a stalker.

I don't remember if I've written about this yet...and I'm too impatient today to look back on a month's worth of posts to figure this out.

Peeps, I've got a stalker...and it's DRIVING ME INSANE!

Here's the back story:
Two years ago, I stumbled home late after a fun "white trash" themed party (which is ALMOST funny considering what has happened since....ALMOST). When I arrived home I wasn't ready to go to bed, so I tip toed over to a neighbors house who was obviously having a party. I ended up meeting Him (aka, the stalker). He seemed cool (cough::I was WASTED hence lacked judgement::cough). We talked for hours, ended the night with a make-out session..and that was that.
He was from California, only in MN visiting his brother. I didn't expect to hear from again. It was what it was: a fun night...that was only going to be ONE fun night.

A month ago my phone rang in the middle of the night. I didn't recognize the number (or even the area code for that matter). I answered, and it was HIM. It took me a few minutes to figure it out..but once I put all of the pieces together my clock started ticking again. I was extremely flattered that he had hung onto my number. He told me he would be visiting MN in the beginning of June, and staying a few weeks. He wanted to see me. He wanted to take me to meet his friends. He had been thinking about me a lot in the past two years. I was speechless.
A few days later we spoke on the phone again, this time in the afternoon instead of the middle of the night. It was different. He was almost incoherent. He kept repeating himself, and his thoughts were empty. It's very difficult for me to explain, but I could tell that something wasn't right with him. My mom-gut red flags were whipping in the air.
I decided it would be best for me (and little man) if I didn't see him, or speak with him again. I had hoped he would forget me by the time he came to MN, but I guess that was just wishful thinking.
Starting the night of June 4th, my phone began ringing in the middle of the night. Not once, but SIX TIMES IN A ROW between the hours of 2 and 3 in the morning. On the sixth call I answered, told him I was sleeping and also made it clear that I did not want him to call anymore, specifically at 2-3 in the morning (HELLO idiot, I had to work!!).
Unfortunately, my short discussion with him did not go through his thick, annoying skull. In nine days, this man has called me over 15 times (only two calls were during the day, the rest were in THE MIDDLE OF THE NIGHT). Last night was a final straw. I picked up the phone and said "LISTEN, I DO NOT WANT YOU CALLING ME ANYMORE! I WORK AND ENOUGH IT ENOUGH!" (or something like that) and proceeded to hang up.
Peeps, I don't know what to do. I've texted him multiple times telling him to stop calling me. I've told him multiple times that I don't want him to call me, and that I don't want to talk to him or see him. The guy just won't give up!!!
Do I file a restraining order? UUUUGGGGHHHHH!
I've taken the liberty of blocking his phone numbers (the ones that I know of) but that's not going to stop him from calling me at all hours of the night from a different number. I'm spent. I'm annoyed. I'm extremely frustrated. I'm desperate for this to stop....and I'm beginning to think (and fear) that this is just the beginning.

What to do?!