When love ends but you still share bills and an apartment everything becomes a problem. If everything has fallen apart and there’s no way of fixing it, then you have to break everything you share and go through one of the most difficult periods of your life. This is a semi-divorce.
The advice here: try to make it a clean cut. Don’t hang around to much. If you know it’s over, it’s over.
You can split the things you own commonly and try to reach an agreement, don’t forget all the years you spent together. You both should leave the apartment and try to split everything the best possible way.
Be fair and remember: Every end means a new beginning!