Suggest Treatment For Premature Ejaculation Along With Erectile Dysfunction

I am 26 years old male still unmarried. My penis size is small and is not much hard during erect position, i think it is exactly 5-6 inches in length when erect. It only takes 3 minutes to ejaculate when i masturbate. I did not have sex with my girlfriend so far. So please suggest me the treatment as i am going to marry next year.