I wasn't married but long term relationship and I got legal advice even though i hoped it would end amicably.
I also wrote my XABF a letter as I wanted to put down what I felt in case I was upset or unable to convey what I wanted. It helps when I worry about whether I said x or y.
If you arent in danger, I wouldn't rush to offer to move out as you will end up worse off. Check your rights and do what you feel is in the best interests of your children. Take care and I wish you well.