OP reading your post, sounds like you both still want to be together. Time on your own to talk about what you both want, and expect, is all important. Your son will also benifit from both his parents being chillled and not at each others throats all the time, not healthy for a growing mind.
When my brothers and Me were kids we were in bed by 8pm on a school night, for what Dad called “Our time”. Weekends were family time. Children need rules and order to their lives. They feel more secure and happy.