Cmfl, thinking of you tonight, and hope you have found a bit of peace about your decision.
It is sooo true that children are happier with one parent, in a household of peace, joy and laughter, than a life spent with an addict parent who is making the other parent sad and miserable.
You both deserve to be as happy as you can be! you and your precious son. I hope his father gets well someday soon, but til then, show your son a happy life, and a happy momma.
hugs