Lost sensitivity in penis

I am a 27 year old male, I should be at the peak of my sexual ability, but sadly I have become impotent....modern medical science teaches that masturbation does not cause impotence or male menopause...I had been addicted to masturbation...I used to masturbate 3 times everyday, and I did that since 1993, when I was 11 or 12 year old...my outside activities had reduced over the years and masturbation was my only vent...I had become addicted to masturbation...I held a notion that masturbation gave me a good night sleep so I masturbated before sleep every night. Over the years my yeild of semen as well as my ability to masturbate frequently reduced...this happend over a span of 10 years...I had been confined into my room and my days passed masturbating before the computer screen...I watched my ability going down and I observed a change in my organ, gradually it become bend or twisted from the bottom, a bit skewed...NOW, since last two years I cannot masturbate at all...I want to, but I cannot, and also I cannot get good erection...whats the problem can anyone tell me? My symptoms appear similar to what traditional medicine calls "bad effect of masturbation"...is there no hope for me? I want to fall in love...I want to have sex with beautiful women...I also have psychiatric problems...the doctor says that I am depressed and it is causing my impotence...but I am not sure...I have lost sensation on my penis...only the tip is still a little sensitive, otherwise anywhere else I dont even feel a pinch...I dont know if I had been poisoned by some jealous friend of mine, or if is this condition a result of black magic? I am being treated for scizophrenia aswell. I wnat to know what is the cause of my sexual dysfunction and loss in yield? Now I can cum only one in two weeks, like that!