Pray to God! and talk with christian friends, let them pray for you. I know the feeling. I also had the feeling that God left me.. I thought he didn't hear me. He did, but we just need to open ourselves up to feel his presence again. If you have something blocking you it can be awful hard to feel better. I don't know how it is in your case. I am telling you mine and hopefully you will find this usefull. God is always there, we just need to tune in to his frequence and we will be open again so God can fill our lives. Trust upon the Lord that he will fill you again. Try to stay close and keep praying! God bless you.