My girlfriend did the exact same thing to me. She told me I needed to see someone/get help or she was walking away. I really had to weight my options and for the longest time afterwards I was resentful and even hated her for forcing me into doing something I didn't want to do. Now that I'm more stable and living a more productive life I see she did what she did because she loves me and wanted me to be healthy. I no longer resent/hate her.

It was a hard situation to be in and in the end I had to decide what was more important, the fun highs or my relationship.