If you are sure the marriage is over, then I hope you've spoken with an attorney.

Age 30 is quite young. With no kids to consider, you are very free to move on. Those two facts give you good odds of building a better future for yourself.

To be living with someone you plan to divorce must be painful and lonely. It has to be. You just have to endure this current pain as what you must go through to get to another place. If there is any way you could be physically separated from him sooner, that would be good to arrange. Meanwhile, take advantage of what opportunities you may discover to be elsewhere, with other people.