Tammy, I'm not part of this group, but when I read your post I was compelled to reply. My husband also dropped the "I don't love you anymore" bombshell on me, and it was the most incredibly awful shock of my life. Of course he also had a "friend", as they all do, which tipped me over the edge. My only advice is to see a therapist as much as you can; understand that you will find so very much kindness and support from those around you, which you should accept and ask for; don't beat yourself up about not "snapping out of it" - you won't, because someone has radically changed your life without your knowledge or consent. It might help to see a therapist as a couple: not to get back together, but to get a better understanding of what's going on. (In my case, I now realize it was a combo of his mid-life crisis, a predatory and much younger woman, his inability to communicate, and his cowardice which prevented him from talking to me before it all went too far.) It will be difficult for you to stay in the same house together, but it will give you a chance to get some of your frustration and questions out at him. He has no business calling his "friend" from anywhere near your family. He's a married man with children and responsibilities; if he can't honour his marriage vows, he can at least put a knot in it while he's still living in your home. Why doesn't he just rub your face in it, the louse. He needs to know just how selfish and unacceptable his behaviour is, and how he's toying with your sanity and survival right now. Grrrrr. Right now he's probably feeling like a hero for staying with you and the kids to help you out. He isn't, he's a self-centred
pr**k who has the gall to destroy you and then make you feel grateful for a few crumbs of kindness when he's not too busy with his "friend". (Yes, I'm still a little angry...)
Tammy, if you want to rant to a stranger who has survived (barely) the same unfair and cruel treatment, just PM me. At this point it's better to feel anger than defeat!