Thanks for sharing your story. Similar to yours, I quit. He didn't. I have his child. He has his crack pipe. We occassionally cross paths and I wish him the best. I still care about him, love him maybe. But most important is that I stay away from people, places and things that might lead me back to the dope again. Protect yourself - your serenity - at all costs. Without it you have nothing.
No crack in my life. No one who is using crack in my life. No exceptions.
Good job at setting boundaries. Now stick with them no matter what because, quite seriously, you will be as good as dead if you don't. :-)