I didn’t know he was married !!!

For 3 years this man has been pursuing me.. I knew he had a child and history between him and his babymother but I didn’t know they were married... it’s her birthday today and he’s following me around all day at work.. and I want to ask him so badly, but I feel that’s his job to tell the truth... I feel so bad for her.. idk what to do 🤯