J.-
Let me say, I am so sorry you are going through this! If I could, I would come over as a shoulder to cry on and to give you a big hug!
I know what you are going through. I could have almost writtent the exact same thing! I have a couple words of advise for you.
First, if you truely love him and you KNOW he loves you and wants to be with you and NO ONE ELSE, then I would suggest trying to work it out. You will NEED to go to counseling to do so. Whether you go as a couple or if you go by yourself, I would go. It took my supervisor telling me that if I don't go, I will get into trouble at work because my at home problems were effecting my job so much. I started seeing my counselor about 4 months ago and I really wish I would have gone sooner. She told me one thing that she continually tells the women that come in and say that their hubby is refusing to come. She tells them to ask their hubby to come so she can give them tips on how to help you. I had to do that with my hubby and guess what-he is coming with me to my next appointment on August 6th!
Also, one thing that has helped me with my hubby is I made the decision that if I had to, I COULD raise my baby on my own and I told him that. I told him that he has been absent for so long, that my daughter no longer knows who he is and that she has started calling my sister's bf daddy. I told him that if he is fine with that, then he needs to leave and not look back, but if he wants to be a part of her life than he needs to step up and be a daddy to her and we can work on being husband and wife later, when he was more comfortable being a family again. I also told him that if he doesn't want to be husband and wife any more, than he needs to tell me that too so I can stop putting energy into this relationship and start putting it into raising our child.
Second, tell your family. For the longest time, I avoided telling my family anything about the problems I was having with my hubby. When I finally did, I was so worn out that I didn't know what to do with myself. You know what happened after I told them-my sister became the biggest support that I could have imagined. She has been there for me when I have needed her and she has helped me with raising my daughter and giving her the support she needs.
Third, you need to be prepaired that you could end up raising these children without the help of your husband. I really hate to say this, but from what you have written, it sounds like there is a good possiblity that he has already stepped outside of this marriage.
I hope for your sake that you go and see a counselor and talk to your family. If you need someone else to talk to, please feel free to contact me at ____@____.com I'm not able to check it until after work or after the baby goes to bed, so if you send me an email there, it may be a couple of hours before I can respond back, but I will respond.
Best of luck,
Sam