Absolutely! Love is based on trust! Don't even think about that, all you need to focus on is working on yourself. My H moved out and he had an A which he said he ended. I just have to believe it is true. I am making changes on me that is all any of us can do. These things we are fixing need to be done whether we stay with our S or move on to the next relationship.
Snooping and worrying about H's A is a waste of energy we need all our energy focused on our changes. Don't stray from the path you are doing so good. This changes nothing!