kimzerker,
My heart reaches out to you. First I would like to say that I know the pain, disappointment and deep sense of betrayal that you must be feeling, firsthand. What you are feeling is very real. You need to know... more than anything else right now... that you are very much loved by your Father in Heaven. You are one of his chosen and beloved daughters and he has not forgotten you. Please go to the bishop. Allow him to give you words of guidance and comfort.
Encourage your husband to visit with the bishop. Then go together... to visit with the bishop, to marriage counseling, weekly date. Despite how upset you may be, make every attempt to do this with in a manner which is consistent with the gospel...remember that the gospel is meant to build us up, to bring us to repentance, to draw us closer to our Father in Heaven. You can save your marriage. It will take time and work, but it will require an honest effort on both your and your husband's part.