be strong, im pretty much in the same boat. when you are ready look at at the circumstances that led to this. you can try to piece together what went wrong. do not blame yourself or your partner. look objectively. to leave with the kids is a big hard decision so something is not working. when you can try and make sense of what is happening come up with a plan to talk to your partner when you are calm and collected. also make a plan of what to do if you become angry or sad when you two are talking how will you handle those emotions so they do not intrude into your conversation.