I've recovered from backsliding multiple times.\nIt's through God's grace and mercy that we are able to manage our sins and down falls.  We don't ever truly defeat them, but we are able to recover if we will humble ourselves and alloy God to change us.  \n\nOnce we get married... There's more at stake.  There's more people involved then just you.  Your sins and downfalls will greatly effect your spouse as well.  If (or when) you do sin, you have to humble yourself and prove to your spouse and God that you are changing.  Faith is action.  If you want someone to have faith in you again, you have to prove yourself to them once again.  Then, it's through God's grace, Mercy and forgiveness that you are both able to overcome the pain the sin and backsliding has caused.  Once you realize that you have sinned and asked forgiveness for that, you need to keep yourself accountable to God, yourself, and your spouse.  It's not easy for you nor your spouse to recover from backsliding but yes it IS possible.  My wife and I are living proof.