I can't claim to understand him well, but I know how I would take this if I were in his shoes, I only offer food for thought, not advice or any product of my mind-reading ability (that will cost you extra!).
If I haven't actually told you that I feel like I'm always blaming you for your relationship concerns, it would bother me that (yet again?) you're trying to read my non-verbal signals and 'interpreting' what I say. I will say what I mean and mean what I say, I value clear communication. When somebody 'interprets' everything that takes away my ability to express myself, since when I say what I mean you don't hear what I mean, you hear some interpretation of it which I cannot anticipate and correct for.
Having said all that, it's waaaay better for you to air your misconceptions about what I'm thinking and feeling rather than continue to 'interpret' everything according to what you have guessed about what is going on inside me. I would hope that I wouldn't jump to the conclusion that you're 'interpreting' everything right away, and that by now I'm wise enough to not hold that against you too harshly even if you are. If you wanted to make sure that I don't do that you might have said "I have relationship concerns which I'd like to resolve. They're about communication, so by definition they're problems that don't belong to either one of us alone, they're problems that we share, that stand between us. I want your help to get rid of them, I don't want things to stand between us."
I'm not sure why you think (or thought, I realize this was posted days ago) that this is part of his 'defenses', and he may not see it that way. Unnecessary characterisation of things is distressing to me, I might feel it necessary to clarify that there are no 'defenses' before giving you the opportunity to address whatever it is you think you were talking about. So far as I am concerned, you're trying to talk about something that you've imagined. (Maybe you're not, am obviously guessing at a lot here.) Attempting to justify things in terms of his feelings could only possibly not make things worse if you're accurate about how he feels, and you shouldn't assume that unless he's specifically told you (again, this is how I might feel), you might try to approach problems without attempting to assign feelings where possible. IMHO "problems that stand between us" would not require further justification to warrant action.
