I can’t sleep

I am on the brink of asking for a separation from my husband. We are in counseling and talking openly about the possibility. I just can’t get myself to pull the plug. This is my impetus. I am the one who wants the change. He does not. I am so worried about the future: hurting him, hurting my teenage kids, making our finances and logistic more difficult…I’m having a hard time sleeping and I feel sad and scared a lot of the time. I know CTFAR but I’m overwhelmed.  Please help.