What is going on?!!

I'm so confused yet not really. I don't know if my man is still sleeping with his soon to be ex-wife or not. I'm wondering if he was during our first few months together. I have a feeling he is and was. He just told his supposedly soon to be ex wife all about me and said that he was gonna set the record straight with her and he told me that she went crazy!!! I think he was still sleeping with her or something because in the beginning of our relationship he was always going over to her house to supposedly just see the kids for dinner but yet he would stay for at least 4 hours. I just want to run away!!!!!!!!!!!! I'm planning on taking a plane trip somewhere for a whole month without telling him and breaking it off that way. It hurts too much to talk to him and I am angry at his betrayal. Even though I can't really find visible evidence, I feel the vibe that he is!!! I think the whole time we were just friends last year, he just wanted to find a way to get into my pants!!  This was a man whom I shared all my secrets and almost everything in my heart!!! I feel like such a fool now!!!! I'm I wrong for thinking this?! Gosh, is he really cheating on me? Or was he? I don't know. But something tells me that there's something wrong with being with him!!!