First, nothing she wrote was surprising. In fact, take away the above average sentence structure, grammar and word selection and it's the same stuff people here report hearing from their spouse all the time. I don't trust you anymore, this is just how I feel and I can't change it, it's too late for anything to work, you drove me to this, etc. So, there's nothing in there that hasn't been addressed and resolved by others in the same situation; there's still hope.
Second, I would have toned down the response a little. It read to me almost a little holier than thou which is not what I would think you'd want to shoot for. Here I'm referring to the part where you mention her taking the easy option and you taking the Love Her Forever option. It may be true, just might not be a good idea to put it in neon letters like that. Also, I don't think declarations of future behavior (I will never....I'm not going to.....I will...etc) are a good idea because I'm betting your R has had plenty of those in the past and they have not worked out in your favor. Finally, I've gone round and round with myself about the "no one will love you like I love you" idea and came to the conclusion that, while I may feel that way, it's not going to have a positive impact if I say it. I think that's probably true in general.
In the future, if you get something like this from her again, less is more. I respect your decision, I have made my own in regards to us, I ask for your reciprocal respect of that. Oh, BTW, I think we need to take care of this financial sep. That's it.
She said it nicely but she bashed you pretty hard. I know how much that hurts. You handled it well, keep working, keep reading and don't give up.
