First off, I'm sorry you're going through that. I have no way of knowing what you're going through, so the following is just perspective based on my own experiences, and not necessarily direction for you.
On the forgiveness, I'm afraid it's as simple as "forgive us our trespasses as we forgive those who trespass against us." If we don't forgive, how can we ask forgiveness from God in light of the previous prayer? Easier said than done, I know. What seems to work for me is praying for the offending party. You don't necessarily have to bring him into your family if you think that he will bring harm, but you do need to forgive him. Additionally, your husband is an adult (I'm assuming and hoping
). He is responsible for his own decisions, regardless of what his friend advised.
On the disappointment with your husband, again too many unknowns and it would be presumptuous of me to even pretend to understand, but please consider the pressure and weight responsibility that husbands and fathers face to support their families. That is one of our chief reasons for our existence. Not being able to provide is one of the greatest fears. I don't know what your husband makes, but I would think that $10/hour is a significant cut for most people. Maybe he thought leaving you alone for longer than you would have liked, while not perfect, was a better alternative to not being able to make a mortgage payment, or having a lien against the house for not being able to pay bills, etc.
I'll add you all to my morning prayers today. God bless.