The key is to not fight it. desire is a very normal thing similar to hunger. if you go 2 days without food you can't stop your body from feeling hunger. so its unnecessary to label it as bad, label it as a completely natural thing you will go through but at the end you need to come up victorious. Your soul depends on it. the bible even says it is possible for us to go through our entire lives without sex. that should be your motivation that it is entirely possible to go on without it with faith