Yep, Lou. Nice, Corri. A good list of things to accept the blame for, for sure.
And, WhatisLife: my W blames me for lots of things, too. It's amazing how she can twist things around to make something my fault. I am somewhat of a "blame sponge" because, to me, it's easier to accept the blame, and apologize for it, then to go through the painful exercise of her endless monologues of how something is my fault, and how I never apologize in a timely manner. So my quick "ownership" and "apology" are sometimes just a way I see of getting past all the crap that's going to be dumped on me anyway. I know, BF, pretty beta.
Still, WIL, I'd tell him something similar to what Corri said, or just tell him you think he's full of sh!t, and the reason he lacks confidence is because of the microscopic size of his testicles. Oh wait, you're trying to get back together. You're trying to get back together? WTF?
Well, I'm sure you have your reasons, just as I have my reasons for staying with my W. But sheesh, maybe you just look at him and say, "If it helps your self esteem to think that your lack of confidence is my fault, go ahead and do that. Just keep it to yourself. Oh, and go seek counseling." Personally, I'd make it a deal-breaker on getting back together that he get counseling. But that's just me.