3 months here for me and my H blames me for the breakdown in my marriage. I took the blame to start with but after IC and analysing of our marriage (he never told me there was a problem - just walked out one day - actually went out and didn't come home) yes I see my faults but he chose to have an EA and leave. It will get better. I still have my bad days, but the good days are now out numbering the bad.
Don't try to guilt him over your D - it won't work and will just push him further away. I tried that - of course it didn't work. My kids are older then your D and they are slowly adjusting to the fact that D doesn't live here anymore.
You need to explain to your D that daddy doesn't live with you anymore, but you both still love her a lot. That she now has two houses and two bedrooms etc. That just because mummy and daddy don't love each other anymore (well actually in my case I told them that daddy doesn't love mummy anymore, he now loves OW - as my kids know that I love daddy dearly), but we both still love them.
H 34, W 36 T 13.5 M 8.5 C 6yo twins S 6/5/11 OW 7/6/11 OW moves in 9/18/11