I am speaking from experience. Snooping will just drive you crazy. What do you hope to accomplish by snooping? To prove that you are right? What will it change? It will just push him farther away. You can not control his actions. If you confront him with what you find out, then that is going to make him do it even more. I have been there. It's not a fun place to be. My advice, don't snoop.
