So now he says that he doesn't even care - what kind of a response is that?
Uncaring!
Maybe as you realize that you want someone to know all about yourself - he's not the right person for this. Maybe search for someone who is a bit more mature (or professional). Maybe instead of searching for one person - search for several (or many) and share a bit of yourself with each of them. Getting acquainted takes time.
And ask yourself - why do you want someone to know all about yourself? Maybe you want to be known? And valued.