Make up your mind about your sin being put to death, work at it and give over your emotions and desires. Ask God to take over your feelings through prayers.
All of our sins, failures are nailed to the cross with Christ. Count on the fact that your sins are forgiven and we are made alive in Christ, dead to sin.
Christ died for us and took our place. His death was the punishment for our sins. In his own body he took on all our failings and can identify with what we go through.