I need help; I might have a creeper on my on Tumblr?

[Tarryn]

I'm on Tumblr and this guy is very interested in me for some reason.

He's 20 [or so he says on his profile] and he says his name is Brian. He's shown a picture of a school yearbook of "him" and it says Brian. But he could've stole that and is using Brian as an alias or something.

I don't know why, but he's VERY interested in me! He talks to me a lot, and says he has a lot to show/ask me and seems to want to get to know me. He COULD be friendly since we're of the same ethnicity, but he's creeping me out a little.

I'm only 17... I know the age gap isn't big at all, but even I still consider myself a little kid. I'm just a little girl! And even when I'M 20 I'll just be a big kid! [this is just my worldview based from my culture]

He's never asked for my phone number or where I live, but he ALWAYS wants to talk to me. Help? I'm a little scared!