Parenting: Friends Talking Community

My ex-husband and myself reconciled a year and a half ago. We bought a house together, and recently he has expressed to me that he's not sure he wants to be in a relationship any longer. After many conversations he's come to the conclusion that he wants to split. It has nothing to do with me or our relationship, and he acknowledges that. It's also not about wanting to see other people. He acutally has really no desire to sleep with anyone else. He goes through these spells of depression and when he gets stressed he bails--which is all due to his PTSD from the Iraq war (he was a Marine and fought in it the first 4 months of the war). I understand that it's not about me or our relationship. And there is no tension or anger or anything between us. Things are as pretty close to normal as they can get. It's almost like nothing has happened, which I find odd too. He told me that he still wants to live together...which I find is wierd considering that the reason he doesnt want to be in a relationship is because "he just wants to be alone". But he does want to sleep in seperate rooms. We have a 6 year old daughter together, and i'm concerned that her seeing us sleep in seperate rooms will be confusing and may hurt her in the long run mentally. Are those fears valid, or should I not be concerned? I am only going to stay until I can find another place and save up money, but until then I dont want to cause any damage mentally, or confusion to our daughter. We're still sharing a room as of now, so it's not an immediate concern, but I'm not sure how much longer we will be sharing a bed. Any advice would be great. I'm just trying to do the best for my child. I've even thought about having her go to a therapist just to make sure there wil be no lasting effects to our split, and to help her understand.
Thanks in advance.
Becca