Making difficult changes doesn't mean giving up hope. And for some of us, the thinking too far ahead sets us into a panic. I know it does for me. The fears take over and I have a whole story in my head of how it will play out.
Just that you are thinking about it and knowing that things the way they are cannot continue is a HUGE HUGE step in the right direction and you will know what to do when you are ready to do it.
Go easy on yourself. This is hard.