Thanks for your comments, everyone. I really appreciate it -- I do have to decide for myself, and I shouldn't rush things.
Unclebigs - I understand what you are trying to say. However, you have to try to detach yourself emotionally from a situation when a small child is involved. When your spouse spends his entire paycheck and money for Christmas on drugs, or shoots up in the bathroom with a two-year-old in the house, empathizing is a little difficult. And furthermore, Al-anon and any self-help book you read tells you to focus on yourself and what is going to make you happy. I have tried to be supportive, but I'm sick of getting lied to, sorry if that's made me a cold person.