For me it meant that I came to the realization that if he uses again, I can and will make it on my own (he's been in recovery for 2 years now). It means that I'm mentally OK with it and I am at peace with it.
It means that I will always love him, but I will not allow the drug back in my house or near my child.
It means that my happiness will always (I repeat ALWAYS) trump his addiction and all the power it has over ME.
It means I cannot control him in any way, shape or form.
We have boundaries in place now (that he has adhered to). But, before we finally made it over the non-usage "hump," it meant that I had to stop obsessing and stop trying to do everything for him.
It means that if he does slip up again (and doesn't get back on the wagon) that I will live separately from him, will continue to love him (always) but will move on with MY life and what makes me--and our child--happy and healthy.
It doesn't mean I stop caring or I stop thinking about him. If anyone knows how to work that one out, they could bottle it and sell it for millions. It just means you start putting yourself first and you let them sort it out and stick to those boundaries.
The boundaries may seem to exist to communicate to an addict what's acceptable behavior. In my case, the boundaries are there for MY OWN sanity and what I will or will not allow in my life.
I'm worth it, ya know? I deserve happiness, tranquility and a peace of mind. So do you.