You MUST stop contacting ANYONE that you might be tempted to engage in these acts with. That's the first step. You HAVE to stop. I know you're not in control right now but if you continue, you will absolutely destroy your marriage.

I think the second thing is to show your husband how committed you are to your own treatment and recovery so that this never happens again. Get in contact with your pdoc, if you have one. If you don't, try to find one who can help you get this episode under control. Try to find a therapist/contact your therapist. Show your husband that you are appalled with what you did and you never want to do it again, so you are going to treat your illness as best you can.

Repairing the relationship will be hard but if you love each other as you do then I expect you will both be committed to repairing it. Maybe couples therapy will help if he's willing.