Broken heart and it wasn't even my fault!

Hey, about six months ago I was in a hellbound relationship, I was blamed for everything, he was on drugs, all of it, so I split up with the guy and moved on..but unfortunately it was with my now ex boyfriends best friends brother. So we were together for about three months, but I got with him at a very awkward time. He was joining the RAF, and he and I were still incredibly happy and willing to give it a go, even if it meant his life would be in danger. He was happy to join the RAF to help others, because that was the kinda guy he was. But anyways, the day before he went away to his introduction to the RAF (where he went away for three days to see if it was for him) I slept over his flat, and on his leaving date I saw his parents and they were perfectly nice to me. The next day all hell broke loose. I was accused of going back to the hellbound ex (Hell no!), a day after my boyfriend had gone away, by none other than my boyfriends sister. She and I absolutely hated eachother at this point, and she spread her malicious lie and even got her mother involved. On the weekend, after my boyfriend had come back from his introduction, we split up due to this. And ever since then we have argued and he has grown so detatched to me that he has blocked me on Facebook and even removed my number from his phone, and even if I text him he will not reply. And now, I have solid evidence from my hellbound ex that I haven't been near him since we split up, but the RAF ex will not see me or listen to me at all. What do I do???

If he won't believe you or give you a chance to tell your side, then deep down he's not a good guy. You should drop him and move on