He might be a messed up little kid. I would set some firm but kind boundaries with him.
That's very creepy.
Also why were you babysitting a 12 yr old overnight with your sister? And how did you not wake up from him snuggling against you?
Is this some weird thing I don't "get"?
He probably just has an innocent, juvenile crush on you. No worries there, it's nothing to take seriously. Why'd you tell us your name though? =|
Probably not. Just as long as his crush isn't sexual in any way. Hopefully it isn't annoying you though.