Erectile dysfunction, Lack of libido.

Hello doctor, I am 28 year old single virgin man. I am having big trouble getting erection it's like a banana only 30% hard. it's 5years started from bodybuilder supplement it's slowly increasing after I am now at the stage to getting married and and my sexual attraction desire is almost gone from my life. my penis size also reduced. Before it was 6 inch at erection now it's hardly 4 inch (although it's not detect fully at all now) I am very depressed anxious helpless Life is hard. I can't sleep well from many years, i have to go to pee at night also. I feel No enjoy in Masturbation. Feeling lazy loss in attraction in everything in my life. I taken antidepressants 4 years ago no longer working. Now no pills or supplements Just seeking for the right advice so I can enjoy my life like before Consulted many doctors they say it's happening due to your depressed and anxiety but the thing is I trapped in the cycle where I got this problems and due to this i got depressed i Beg for help.