I am sorry to hear about this. :-( I know you put a lot into this relationship, it being 10 years and this must be really hard for you. If he has been doing this for 2.5 years, it really was NO accident. He knew what he was doing. So if he decides to try and sweet talk you, DON’T LISTEN. You really do deserve someone who will treat you with respect.
I think the best way to handle this is “move on” in your mind and focus on positive things in your life whether it be family, friends, Church, Workouts or whatever is important to you. Don’t blame yourself as you did nothing wrong. Try hard to keep positive even though I know it will be really difficult. {{{HUGS}}}
Remember we are hear if you need an ear (eye) to listen (read).