I love green tea also but keep in mind it does contain caffeine.
"People sensitive to caffeine and drinking green tea as an alternative should be aware that green tea still contains caffeine which will affect you if you drink several cups.
Green tea is generally brewed with water below the boiling point for 2-4 minutes. Longer steeping times can result in more caffeine being released into the cup. The amount of leaf used also influences the caffeine content."
Read more: http://wiki.answers.com/Q/Does_green_tea_have_caffeine