Why does my red eared slider turtle follow me everywhere I go?

I've had this turtle for about 4 years now and just a year ago it started following my every move once I got him out of the tank for a stroll. Even right now, I've been sitting on my couch for half an hour and he's just been standing there next to my feet. When I get up, he literally RUNS after me and when I stop he stops.
Answers

Alex

He may have bonded to you, assuming you owned him or her at a young age.

nfenn

It definitely means he's bonded with you, which is a good thing

gabriel

Your turtle is taking a likely to you!

Harris

Your turtle has bonded to you, as most animals do. Your turtle likes you.

Anonymous

He's hungry. Feed him.