OP if you had said all this happened "years" ago I still wouldn't have much sympathy with him.....but this isn't even a year ago!
You should ask for some space by all means. Then use that distance to extricate yourself from the relationship once and for all.
Honestly, the hardest part of ending my bad relationship was the loneliness I felt for the first few months. I was terrified of being alone but part of his behaviour was having alienated all my friends! But I got through it and I PROMISE you can too. I can't recognise myself now from the person I was then.
I am going to give you a very un Mumsnetty hug and say you can do this.
On a practical level, take each day apart from him at a time. Plan to do something each day - even if it's just a long walk, reading a certain number of chapters in a book or doing something really dull like hovering :)
Surround yourself with friends if you can. If you can't do that then think of other things you might enjoy doing as a distraction - creative writing, painting anything. Plan something to look forward to.
I promise that each day gets easier than the last and the days then turn in to weeks and the weeks in to months.
Sorry if I seem a bit intense but its a subject so close to my heart. It is so sad to see fantastic women broken down by men that just aren't the ones for them.
This is a great opportunity for you OP! You can do and be whatever you choose from hereon out. Then when the right man does come along you will be able to see more clearly that you don't need a man to be complete you, only to compliment you.
xxx