Can being friends with a ex & them living in your house ever work ?(repost)?

It wont work, i was in a similar situation and it turned out horrible! You guys share a child together and even if you don't want to be in a relationship you'll always have some feelings. If you're going to live together then neither of you will have any space...you still know what each other are doing. If he doesn't come home one night it'll bother you vise versa and cause arguments. If its done then its done and you both need to move on. If he needs to move in with his parents then so be it...he'll just have to get over that.