well you wouldn't know if he's pretending unless he's pretending not to care are so obvious its fake.
i thought it was just either he cares or he doesn't 0_0
Does it matter? If he is pretending not to care, then that's a problem. Either he is mature enough to care and act like it, or he's having some issues. I wouldn't go insane trying to figure out someone else's conflicts about how he feels about me. I have found that those kinds of guys tend to just continue being that way. If he ever wakes up (and grows up) one day, then you'll be the first to know it, and he will let you know quite clearly.
You can see it in his eyes if he's not a sociopath.