Not sure what to do???

Been talking to a man for almost about a month.. I find out through his work page he has a wife of about 5 years. I feel super bad because him and I kissed each other. And after that I asked him about his wife and he said they are “separated” which is a no no to me. I find both of their Facebook pages and she is posting more of him than he is posting of her smh..

Sorry for the terrible story but it’s just a long story I need help with lol..

My question is… should I tell him I found this information and his wife? Should I stay silent and never speak to him again? I’m super confused.

Mind you were about 15 years apart in age.

Someone help!?