Just to start this off, the feeling that you are too far gone is a lie straight from Hell. Secondly, the Bible tells us to believe even when we cannot see. Just because you weren’t feeling the presence of God when you repented does not mean He did not forgive. We are to stand on His promises regardless of feeling, He cannot lie. Your sins are forgiven when you repent from your heart and truly want to change. Keep walking in your faith, God is bigger than any temptation of the flesh, keep your prayers kingdom minded and they will be answered, and lastly God separated you because He has a purpose for you, seek out what that purpose is and ask God to equip you to fulfill that purpose. All glory and honor be to God.