My advice is to really listen to what she has to say and find a way to succinctly let her know that you realize you haven't given her what she needed, but that you want to do that. Also, don't be in a big rush to get back together in the same house (or if you need to do that for financial reasons try to give her space as much as she needs it).

The absolute worst thing you can do is tell her how she didn't meet your needs or how you have done nothing but give and give and give to the marriage. Trust me - if you say those things even once it will be burned into her memory like nothing else.

E-Chic
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Me- 41
H - 44
M - 14 yrs
T - 16 yrs
No kids
Separated - 2 months after 1+ yr of counseling
I am a WAW.