Thanks for your query.You are addicted to masturbation
since you were at the age of 13.There is nothing wrong in masturbation It is a biological need of a man to get sexual satisfaction which is achieved by masturbation in absence of a female partner.It has been proved that masturbation does not have ill effects on your sexual life in future So remove this myth from your mind.If you are facing other problems like premature ejaculation
and night falls you have to change your life style and diet.Have regular moderate exercise,and diet rich in protein,and vegetables Avoid junk food..This will improve your sexual performance.
As regard your second query about foreskin it looks that you have Phimosis
and needs to be circumcised Once you get it done you will not have any problem in performing the sexual act and will be able to satisfy your wife.