Does Masturbation Cause Lack Of Interest And Fatigue?

Hi Sir, I am 27yrs old. I do hand practice once in a week. And I m doing it from last 7-8yrs. I am very weak and very lazy also. My interest is completely gone. Just few months before I broke up with my Gf. I had done oral sex with her most of the time but I didn t feel to do complete sex. So I do hand practice. What kind of problem is this Sir. R s, Xxx