You are a basket case. : ) In so much that your life has been turned upside down and your dealing with the consequences of it. We were all and some still are basket cases. So, you're in good company.
You already know your failing at GALing, if you think or know you can be doing better...then do it.
An intenerary for the kids is fine, you could email that to him, if you have his email.
Your boys are 13 and 11, and you are their mom, they are fiercely protective of you, you confiding in them about your husband is going to make them them hate him. You don't use your children for support in this, you are supposed to be their support, or rock. Some things you just don't talk about with kids. Is your husband a cheating a$$? Yeah...but you don't say that in front of them.
It is hard to upbeat in front of the kids, but vital. They are going to want to protect you and empathize, and you need them to be kids.
Be as whole as you can be with them.
Experience is a brutal teacher, but you learn. My God, do you learn. - C.S. Lewis
Life is usually all about how you handle Plan B. - Jack3Beans
Listen without defending; Speak without offending - FaithinAK