Guy I was seeing went back to his Ex.

I was dating this guy for about 3 months. We had a lot in common. We both work at the same place and work the same hours. Everything was great. We never had a cross word. Had had been divorced about 9 months from his Ex. It really didn't bother me because it was the second time they had been married( no children) he told me about what happened and said pretty bad things about her, including his family didn't like her. We spent a lot of time together, we would go out on dates, he would spend the night several times a week and we would get up and go to work. He said he really liked me, and what he liked the most was our backgrounds were similar. He said I really like how I can tell you anything, and I have told you things only my family knows. I opened up to him also. He said I was so easy to talk to and he really enjoyed our time together. We talked on the phone for hours everyday that he was not at my house. And we would text off and on at work. Well a few weeks ago, he went from a goodnight text with a blow kiss, to not responding to my text the next day. So I waited 24 hours and sent another.... Nothing again. At this point I'm worried this is so not like him. So the next day I'm back at work I see him and he waved and smiled.. After work I waited on him to call like he always does and he didn't so I tired to call him. It rang and rang then voicemail. I didn't leave a message, because now I know he is avoiding me for some reason... But way? A few hours went by and I decided to send one more text. I asked him if he was ok? He replied I'm fine I just have a lot going on right now sorry. So I asked him if he still wanted to talk and see me? He replied I think it's probably best I don't see anyone right now. So now I am just shocked. I sent wow I deserve an explanation... He never replied. I have seen him more at work since this happened then I did when we were dating. He walks by me like I'm not even there. I will not look at him, but the other day I was so mad I gave him a dirty look. I really didn't think he would be the type of guy to just coward out. I mean we shared a lot. And with us working at the same place thought he would have ended like a man at least pick up the phone!! So I am the type of person that just has to know.. So with a little investigation I found out last night. He is back with the ex wife he married not once but twice. Could he have not just told me about it? I'm a good person and he knows this. I deserved the explanation. Now I will be going back to work tomorrow and will probably see him. Hoping I can just ingore and go on. He does not know that I have found out about him going back. Ughh this sucks!! He still has me on Facebook and I think that is weird, the ex is not on his Facebook... Yet anyways. I really thought he was going to be the one. I feel for him as fast:-(