How To Recharge Brain On Withdrawal From Crystal Meth?

I have used crystal meth chronically since i was 20 years of age and now i am 30. It feels like i have a battery for a brain and i don t feel like i m very well stimulated by life. I am currently in a psychiatric hospital and have been clean for a year and a half now. My only problem is i don t know how to recharge my brain so to say. Is it possible that i ve become to dependant on crystal meth