Hugs to you. I would imagine it is hard not to feel guilty, especially since you have been married to him and had a life together.
However, remember that HE made this bed. Not you. He made deliberate choices and now he doesn't like the consequences. That is too bad for him. But they are still his.
Tomorrow, you have a good time with your children and the rest of your family. Expect to have some up this bubble up tomorrow. However, make a concentrated effort to just enjoy the day and not get bogged down with the A. Hold your head up high, you have done nothing wrong!