Loneliness can really drive you crazy.

This is really true, especially if you're one of the top ranked seniors or you're really intelligent person. Or it's just because you like to be alone.

Mine's in Case 3.

Although everyone likes to be on their own at times, but if they don't have someone to speak to for some time, they will end up being called...'weird'. As in the literal meaning.
And they'll end up speaking alone...to themselves. Oh me.

I'm getting into that level already...

Someone stop me before I go reiterating myself again!!

P.S.: Something about self-image & personality...check this out!