I want a trial separation, he doesn't?

So I kind of know what I have to do, I just want to know if anyone else is in a similar situation. Our marital trouble started lasted year and has not improved. I don't think I want to try to fix it. I am done. Anyways I have expressed my feelings, and he said "Ok guess I will start looking for an apartment." That said he seems to have amnesia and forgets the minute he wakes in the morning. I don't want to be out right mean, for the sake of our daughter, but I want him out. I can't stand him anymore. We are not romantic, we are just friends and in many ways always have been. Does anyone else have a spouse that likes to forget or ignore what is going on in the house?