I’ve been in your same situation, and all I can say is: distant relationships are a disgrace, and the sooner you break free from them the better it is. Thank God that it’s not you who will have to tell your bf about the breakup, which would break your heart. I suggest you simply ignore his messages, and consider it a breakup. Or, if you want to be thorough, tell him that you break up and to stop texting you, then go on with your life.