Can My Marriage Be Saved?

[a girl]

I haven't posted in a while because I confirmed that my H is having an affair. An online affair that has been going on for about 2 months (since about 2 weeks before he told me he didn't want to be with me anymore).

He wants to leave me to be with her. She's in an entirely different state - the state his parents live in. He planned a trip with our S to visit them and was planning to see her at the same time.

I asked him to stop contact with her so he could focus on being a good parent to our son. He was unwilling but finally did.

I told her husband about the affair - he confronted her and she initially wanted to work on the marriage, but he informed me today that she and my husband are "in love" and she wants to separate so she can pursue my husband.

My husband has said our relationship is over and this isn't an "affair" because of that. I'm fairly certain that once she informs him she's leaving her husband, he will leave our family for her.

I think I'm going to die.