I know exactly what you mean. I struggled with it a great deal. Roxy hit it right on the money- you need to TALK with people who are supportive, and a counselor/therapist should be part of the mix. When I started (FINALLY!) to talk about it, I found people would often say things like "Don't be so hard on yourself..."
One of the biggest hurdles I had to get over was the whole definition of what, to me, "Acceptance" meant. I started out thinking it must indicate failure, which is where most of my deep shame was coming from. I felt like if I accepted it, I would be just giving up, giving in, taking the easy road. Ha! What I finally realized was... self-acceptance is the beginning of SUCCESS, not failure. Health, not illness. Love, not loneliness. Everything good that's happened for me over the past year (and there have been a LOT of things!) has flowed from self-acceptance. Everything bad in my life came from self-deprecation and non-acceptance.