John 8:44 is talking about the devil and says, "He was a murderer from the beginning, and does not stand in the truth, because there is no truth in him. When he speaks a lie, he speaks from his own resources, for he is a liar and the father of it."

Don't believe the devil's lies.  Instead, go to the Word of God and find the promise which reveals the truth to your particular situation. 

In regards to: 

Salvation: Romans 10:9 says, "If you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved."

No one is good enough to be saved but it's not a matter of being good.  Jesus made a way just as you are through His death & resurrection. 

It's a matter of admitting you are a sinner, that you're without hope unless Jesus saves you and by asking Him to forgive your sins.

Healing: Isaiah 53:5 says, "But he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes we are healed."  There is a physical healing available just as there is a spiritual healing in salvation.  As in salvation, begin to believe for your healing, pray and ask for your healing.

Deliverance: In Luke 10:19 Jesus is speaking and says, "Look, I have given you authority over all the power of the enemy"  And in Rev. 21:11, "And they overcame him by the blood of the Lamb, and by the word of their testimony"

Addiction to anything that is not of God is of the devil and you can be delivered by the power of God. 

Every person born is a three-part being:  Spirit, soul and body.  The spirit is that part of you that communicates with God.  Hence, it is, or isn't, "God-concious". 

The soul (or mind) is concious of "self". or self-concious.  It will tend to please the wants/desires of the body unless the spirit is built up in the Word of God and faith in His ability to deliver. 

In any addiction, the needs for the body are stronger than the needs of the spirit, which is communing & fellowshipping with God through prayer.  

Once the spirit can overcome the desires of the body/soul and it takes control over body & soul, deliverance is very near.  

To overcome your addiction, begin to pray on a regular basis or, if you are already praying, increase your praying.  Allow your spirit to build in faith by fellowshipping with other Christians, reading the Bible, listening to Bible teachings on tape or CD, watch Christian videos, etc. 

Matthew 18:18 says, "Verily I say unto you, Whatsoever ye shall bind on earth shall be bound in heaven: and whatsoever ye shall loose on earth shall be loosed in heaven."

Prayer can "loose" the spirit of addiction from you.  Begin praying with that goal in mind.  Pray and "bind" the work of the spirit of addiction (drugs, alchohol, porn, lust, etc.) and loose it from your body. When doing this, get together with 2 or more others who can agree with you in prayer.