Seek Jesus in prayer. Cry out to Him, he will hear you, and answer you if you mean it! Ask Christ Jesus to save you and forgive you of your sins, and wash you whiter than snow, however you must not return back to your sins. In prayer to Christ Jesus, you must repent of your ways, and decide to put Christ first. Christ will give you peace, a deep peace, and instantly the depression and the darkness will simply disappear.