I won't respond. Just let her have her last word. She shifted the focus on her in the end, and that's where it needs to remain.
Other things to consider is validating her feelings from this point out. Don't bring anything up, let her, and when she takes the lead to discuss something, make sure you really listen and validate. Let her have the last word. You don't have to agree with her, but the point will get across that you're listening.
Also, her stating you deserve a better person than me... I wonder if she feels somewhat guilty? When we walk away, we do feel that guilt, but some are really good at stifling that, not accepting that, others can wear it a little more openly. Depends on the person and situation.
