I don't think being introverted is something you need to 'cure', as long as it is not detrimentally impacting your life. I only really have one friend my own age IRL, and we don't do an awful lot together, but I get enough socialisation through work and church to where I don't feel like I'm being devoured by my own thoughts every day (like I used to). I feel like I have enough of a connection with the world.

You find a level of social interaction that suits you, and as long as you can still hold a decent conversation and interact with society in a sensible manner, I don't think you need to push yourself to be a people person. Heck, that might even do more damage than good.