The Mad House

So, I'm absolutely terrified right now.
I downloaded this thing for music, and apparently it has a chat feature on it. Some guy added me, and I just clicked accept because I always do- I don't really care, nor do I pay attention to it.
So he messaged me yesterday, and we had an okay conversation.
Same happened today. Until he said something creepy. He asked me how my day was, and I said it was fine, blah blah blah, but it wasn't like I could do much cause I was snowed in.
He said: "Me too, I'm in ____." The ____ is the town right next to where I live.
So, I was kind of freaked out, but I figured it was a coincidence. Then he says, "You're in _________, right?" _________ Is the town I live in.
I shrug it off, figuring I had my zip code or something on my profile thing. So I said something like, "Well atleast all of the snow is good for skiing" and he says, "Yeah, I wanna go snowboarding. We should go sometime" And so I freak out. I looked at his profile, and apparently he's 23. A 23 year old and a 15 year old going skiing together? NOT appropriate. Then he tells me I'm cute. Then I block/report him, but now I'm just really creeped out and I feel like someone's watching me. I'm probably just over reacting, but I'm really scared. And Kim won't answer my Skype messages, Tanner went offline, and I have nobody to talk to. :c Havierre's not on, either. I told Tanner about it before he got off, but all he said was "Lol he's probably in your attic watching your every move." Thanks, Tanner. That really helped.

I'm. So. Scared.
Help?