Do you know.. you are feeling exactly what I felt in July last year when I split from my (now) xp. He was not my dd's father but had been around for 3 of her 5 years nad was the closest thing she had to a proper dad.
It was breaking up his and her relationship that made my heartbreak.
Like you I knew he lovd me infininitely but there are somethings that, not matter how much you both love each other, just can't be compromised on. For us it was drugs/lying for you guys it's parenting techniques.
I've no real point to this post other than to tell you that I have been in your position and can so relate to trying to make people understand that you know he loves you and that despite everything/anything he's not a bad person.
I hope things work out for you you do sound very very strong. I'm only just starting to feel like I'm getting my life back together and xp is still on the scene (like you close mutual friends). I still love him and he still loves me but I think we are both resigned to knowing that we just can't make it work (we've tried twice now with a 4yr split and my dd in between)
Who knows what will happen in the future between you and he.