"No temptation has overtaken you that is not common to man. God is faithful, and he will not let you be tempted beyond your ability, but with the temptation he will also provide the way of escape, that you may be able to endure it." (1 Corinthians 10:13)
When it comes to addictions, there is both a physical as well as spiritual component. Addictions and addictive behavior not only affect neurological patterns, they also tend to cause things like guilt, anger, and lusts to stew under the surface of who we are as human beings.
Also, while it may be true that there is some genetic factors that contribute to addiction, particularly to substances like alcohol, addictive behavior results from a choice the individual makes to engage in an activity or to partake of a particular substance. The individual becomes an addict at the point that his or her sinful choices have become so habitual that he or she no longer recognizes the willful choice and the no longer recognizes the harm caused to oneself and to others.
This does not mean that the individual has become diseased but rather that he or she has become enslaved to that sinful activity. The habitual nature of choices can and does have physical, emotional, and mental consequences, but these are effects rather than causes. Overcoming an addiction involves recognizing the truth (conviction), repenting (turning from sin to God), faith (trust in Jesus who forgives us) and replacing sinful habits with godly ones (putting off and putting on the new man). If you are ready to go through this transformative process right now, at this moment, is the time to take the next step.