sparing feelings

My SO and I ended our relation ship a week ago. It wasnt exactly mutual at the time but the more I think about it the more I realize it's the right decision.  In the end of our relation ship there was a lady he spoke to every now and again in regards to work he was doing for her. The minute I met her u had bad feelings about her and her motives and my boyfriends motives because we were in a bad place at the time. My ex and I spoke today and he told me that they have talked since our break up and about our break up, and that she had recently ended her relstionship too. He also admitted he is attracted to her. That hurt me sooo badly.  I feel like there is more there and he is trying to spare my feelings but I feel like I would rather it all be on the table now so I can deal with it emotionally right now rather than when I'm starting to feel better. So my question is should I talk to him and tell him that I need to know the truth and that sparing my feelings is not helping? Or should I just leave it be?