You are probably right in maybe not needing/wanting to hear all the "details" as far as his thinking goes.
As far as messing up about the "love is a choice" thing, I don't think you messed up at all. Unfortunately, he doesn't see it that way, but I believe it's true -- he is choosing to feel the way he is and w/ his continuing to allow himself to feel/think negatively about you and your M, he is CHOOSING not to allow himself to feel the love for you that he wants to feel/thinks he should feel.
Me: 38 H: 35 S4, S5, S10 Bomb 01/07 Wanted D - nothing would change his mind Numerous A's prior to D bomb; EA prior/during D bomb Piecing 04/07 Deployed for a year 05/07 Still Piecing 2010 M 11 yrs 05/10