I've told DH I want to separate. I've been trying to keep things going for years and have told him several times previously that I was at breaking point in terms of our marriage. I have had a few health issues over that time along with difficulties with the DC, which I've had to manage by myself more or less, and have had no support from him whatsoever amongst other things. There has been some emotional abuse in the marriage, which has got worse in the last 2-3 years.
He has apologised for his actions and promised to change but keeps constantly coming back round to the idea that I've found someone else which he describes as a 'niggle'. Which is ridiculous as I never come into contact with any men these days really other than the sole male colleague I have and a couple of the DCs teachers, none of whom I find remotely appealing. To my mind this means he's not taking his part in all this seriously and it's making me angry - like the marriage couldn't be bad enough on its own IYSWIM? Which also makes me feel I can't take him seriously in terms of his assurances that he'll change. In spite of all this he wants to make a go of things, even though I've told him I don't even fancy him any more 
The question is what do I do now? The house is in both our names so I can't force him to move out. Can you divorce someone under the same roof as you? Has anyone done it? I don't want to make things awful for the DC but I really can't carry on like this.
Sorry for the long post. I feel very stuck RN.