I quit smoking and drinking for God some time ago. I've somewhat fallen back to those days and lost my zeal for God. I hang out on these forums and God visits me often and communicates with me, but I just don't have the zest. I'm currently praying that God will provide that zeal and zest for Him in my life. I will pray that he delivers this to you also.
This happens to the large majority of us brother. Our prayers can become cold and desire for Him can seem muted somehow but, He is still there and He never changes. So much we MUST take on faith, play some worship music, keep doing what you are doing, seeking Him to set your heart on fire for Him again! He will do it, believe it! :)