You guys were so close . . there are obviously things you like about each other . . some of those may survive the breakup. Is it possible that you can just be great friends, who also happen to have some history? You should talk to her . . . and give it a try! It could be great!
it can't be easy living with your ex. you [&mal] should have me over again and we can cook more nummy dinners 
If you want/need to talk, I am available.