Sometimes we go very low before we realize we have hit rock bottom and need to turn to God for help.  It is never too late!  

“And he arose and came to his father. But when he was still a great way off, his father saw him and had compassion, and ran and fell on his neck and kissed him. And the son said to him, ‘Father, I have sinned against heaven and in your sight, and am no longer worthy to be called your son.’ Luke 15:20-21

If you have a repentative heart, God will always take you back.   First, face the truth about the situation, repent of your sin, and turn your whole heart, soul, and mind to God.  

“But the father said to his servants, ‘Bring out the best robe and put it on him, and put a ring on his hand and sandals on his feet.  And bring the fatted calf here and kill it, and let us eat and be merry;  for this my son was dead and is alive again; he was lost and is found.’ And they began to be merry.”  Luke 15:22-24