Under normal circumstances, I would say that six years IS enough time, but in your first post you said you're still in love and were still intimate with your ex-husband. In that case, then, no, it isn't enough time. I'd start the actual countdown from the point you have absolutely no contact with your ex. You didn't say if there are children involved that keep you needing to be in some form of contact though. If there aren't, I'd say cut the cord completely. Or perhaps the best thing in your situation is to not break up with him and stay in a non-married relationship.

Then again, I've never understood people getting divorced but staying together.