Separated but living together

I need tips on how to successfully put your emotions aside and ignore what your ex spouse is doing/ flaunting just for the sake of having a place to live. My husband decided he didn’t want to be married/ a father anymore. So basically just gave up his entire family to live a bachelor life. Then decided to go out last night and do what he wanted and I’m sure he will be coming back today and idk how to take that. If he flaunts anything in my face I think I will probably react badly. I have no where else to go so I have to play nice for a few more weeks.