So what exactly are we trying to figure out here?
You're inability to find a girl who can hold up a conversation? Lets make one thing clear, there are plenty of girls out there who can hold conversations and i've met many who would knock the socks off me in terms of intellectual matter. As I stated, this thread sounds more like "wah wah wah, im a loser, wah wah wah" If you can't find the right girl, then perhaps you're looking in the wrong place.
I stated previously, that no one is going to immediately go into deep and meaningfuls or life-changing discussions with you, in the majority of times, and yes because of the way social interactions work. Does this mean that there all girls are mindless Malibu Stacey dolls? Unlikely. So quit ya whining.
Don't go all "ad hominem" on me, you posted about a 'personal' issue in a forum entitled Love & Relationships. And lighten up, idiot.