"As I read through here, I see many have some of the same experiences that I have or am having. Where do you get the strength to finally say enough is enough?"
When the pain of staying outweighs the good aspects of a relationship you will have reached your bottom and will leave. Until then, nothing will change.
Setting bounderies that you do not keep serves no purpose, it only gives the addict all the power.
Your daughter had a 50% chance of inheriting the gene that predisposes them to addiction or hooking up with one, unfortunately, she went down the addiction path. She is young, with a
strong recovery program she has a chance, lets hope that she embraces recovery for life.
You have a choice, you do not have to stay with him...ask yourself why you do, there must be some payoff, what is it?
Take some time to read the stickeys at the top of this and all the Family & Friends Forums also
read Codependent No More, both should be of help to you.
I am sorry that you are unhappy, however, no one can change that...except you.