My long distance boyfriend of four months is ignoring and blocked me. Why is he doing this? What have I done wrong?

Anonymous
So, get ready, this is a mouthful.
On January 27, 2018 I had agreed to dating someone online (this is my first relationship). I had fallen head over heals for him before I even knew what he looked like; we had met through discord, or rather, fortnite (crazy, I know). I loved everything about him. He was eighteen and I was fifteen and lived in America, I lived in Australia. We used many sites to talk from because my family would constantly ban me and take things away from me because I spent all my time talking to him (which they didn't know of until later). I would always manage to keep in contact with him though. First month into the relationship, things got very.. intimate. We started doing things that we had sworn not to do beforehand but as time went on we became more comfortable with each other and we had phone sex.. almost every night. He didn't force me to do anything I didn't want, which I very much appreciated, he put me before everything during this blossoming stage. He would often tell me how he wanted to see me and how he would come over whenever I pleased, he did state we would be doing it when he got here which I agreed to first and for most. I was always reluctant to have him come over because at this stage (2 months in the relationship) mum didn't like it and wanted me to end it because she caught me sending nudes to him. So we were dating in secret afterwards. Only recently however, he had been extremely pressured since he was a Jehovah's witness and I wasn't but I said I would change for him in order to be with him. He had to confess his sins (everything we did) to the elders and even my age. He had told me that they would tell him to end it but he said he would never leave me and that he wanted to marry me (this had been talked about a lot). After that text, three days he didn't answer any calls or texts, I asked his friends but they blocked me. He talked to me again briefly but did it again. Its been two weeks, I've been blocked completely.
My long distance boyfriend of four months is ignoring and blocked me. Why is he doing this? What have I done wrong?
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