I am 24 year old boy. I have been masturbating for the past 4 years on daily basis. Recently one of my friends told me that constant masturbation has negative effect on health. He also told me that it can affect my sex life once I get married. Does masturbation really effects sex life? I am really worried now.

I don't think so it has any effect on sex life. It's just not has any thing related tot your sex life.
Dont believe your friend..