Sin

I am in great need of your spiritual advice and guidance. This is in regard to a very serious matter in my life. I have been battling and waging a spiritual war with the devil and my inner evil against the evil sin of adultery (This is not the form of adultery with an actual woman, but rather through my senses-eyes and body). I have grown to understand this sin more and more, and have become stronger in battling against it, yet it still has control over me, and it eventually causes me to fall after much struggling against it. 
 
I have started a regular prayer schedule in the morning, in the evening, sometimes in the afternoon, and whenever I feel I need to be spiritually strengthened. I read a different part of the Holy Bible every day, and I read three particular chapters in the Holy Bible on a daily basis (I read Ephesians chapter 6 before I pray, Romans chapter 12 and 1 Corinthians chapter 13 in the morning before I begin the day, and I try to read new chapters in the Holy Bible in the evening or before I go to sleep. I must mention, however, that I occasionally do not pray at night due to laziness or being too tired). I am always aware of my sinfulness, and I repent and confess at least once every one to two weeks. I go to church every Sunday, dress as a deacon, and partake of the Holy Communion. I usually attend Vespers and the Holy Midnight Psalmody (Tasbeha) every Saturday. I am also a servant at my church, and I try to serve as much as I can due to the strong desire of love I have to do so (I call up the kids, set up trips for them, give them spiritual classes, and try to strengthen their spirituality). I commit sins, nonetheless, on a daily basis, but I usually seek God's forgiveness, and do my best to try to eliminate these sins from my life (often, I will be drifting away from God in my life, but the Lord will usually bring me back to the right path).
 
Self Control is definitely one of my major spiritual problems. When the sin of adultery enters my mind, I have learned to be able to overcome it for a period of time through prayer, fasting, prostrations, etc. I am able to struggle and overcome a few times, and for periods varying from hours to days and even weeks. But eventually, I am tempted extremely to a degree that I am no longer able to resist, and I give up ultimately out of exhaustion and commit the sin. I repent after I commit the sin, but once I've fallen, it is very difficult to overcome the sin anymore, and I am usually unable to fight until I confess and take communion again. 

Please, your grace, I am greatly troubled by this sin. It is overcoming me and bringing me farther and farther away from our loving God. 
 
What is your spiritual advice/recommendations?