Ex boyfriend blocked me on facebook?

[Marie]

It was long distance. After last seeing me he broke up with me which was for the best but still hurt. We became "friends." A few days after my birthday (he told me he loved me and that we should talk) he already posted pictures with this girl (he never put any of ours up). I didn't want to talk to him and he understood, but he never said anything about her. A few weeks later we finally talked for the first time since we broke up. We talked for hours and it felt like when we were together. He said he missed me and wanted to talk to me again soon. I said fine, but that HE had to set the the time and date. He said he would, next week, but then said nothing. A week and a half later I told him I rather he didn't say anything at all than do that. He said I was right but gave no explanation. That day a friend of mine from his town told me about him supposedly having girls over when we were together. I was so angry and lashed out but he denied it. Days later some of his friends died in an accident and he came to me to talk about it. Of course I wanted to help him. A week later I checked up on him again and he felt distant, again. I just had a feeling and asked if he was seeing someone. It was that girl all along. I got really mad that he didn't tell me when he's been with her for 2 months already! It makes me doubt what we had when he was with her just weeks after me. I apologised for getting so angry (even though it f. hurts) but still I've been blocked and I don't understand why.
I guess my main issue is that he didn't tell me he had a new girlfriend even though we've been talking since we broke up. I just feel like such an idiot and would have liked some more honesty and tact. How can he care so little?