Do I send him another message?

[Pink Kitty 2]

I had a dream about my old crush. He is not replying to me on Facebook and I don't know what to do. I feel I should do something. It's been 3 weeks since I have not said anything to him online. He has not accepted my friend request. I tried a friend of his who I don't really know much. I'm not friends with his friend. I sent a message a week ago and it says he's seen it but not replied. It has now been a week since I messaged his friend. I asked his friend if he would ask him to check my messages but got nothing. I sent my old crush 3 messages in months and had no reply. If I send another one I feel i'm annoying him even though he has not answered my request. I can see by his profile he has lots of friends and updates his cover photo every month or so. What can I do? I'v waited days for him to reply but get nothing. In 5 more days their will be no reply, it will be the same. Do I send him a 4th message? Why is he not blocking me? (I'm going to get to the bottom of this) Please don't tell me to move on. Facebook is the only way I can contact him, I don't see him outside - sorry for bragging on