Can anyone share their experiences with dating someone with a serious drug addiction?

I dated a guy for over 2 1/2 years whom had been battling addiction to drugs. We were in a long-distance relationship, so I was not aware of how seriously he was involved & the extent of his using. As far as I knew, he was receiving psychiatric treatment & counselling and participating in a methadone program. Apparently he had an entire “secret” life I knew nothing about. I can only imagine the things he might have been involved in.

More Meth Drug Addiction Info: