is impossible for me but i want help

hi, i´m from mexico and my english it is not perfect, i am learning.....all started when I was 12 years old (now I have 24) began with the curiosity that the changes in my body because of my age had. All the time was getting stronger and stronger, I began to look pornography, until the end of hiring a prostitute to have sex, I tried to approach God for many years, but this addiction is stronger than me, now I can not get of mind sexual content that my eyes have seen .... Prayer and just ask for help because I understand that I can not and my only desire is to approach God and someday have a relationship with as clean as it should be from the beginning .... but however much I try I always trip.