How do I move on?

I was in a relationship for 8 months. 4 of them long distance. He made me feel so special and loved for the first 4 until his work picked up and long distance got hard and suddenly me wanting to talk so often was too much. I revolved my world around him. Setting alarms to speak through his day time, planning to put a plug in my career with the intention of moving over to his country. And then he grew more and more distant. I started therapy to work on my anxious attachment he contacted my family 2 weeks ago to reassure them he would work on his avoidance tendencies. Then this time last week I called whilst he was doing chores to talk about a medical appointment of mine and he got mad at me for interrupting him. He ignored me for 2 days and then called whilst I was on the motorway driving and dumped me then proceeded to block me and my family from everything before I even had a chance to process anything. He had a flight booked for Christmas. And now all of it is gone. No contact , no closure , no answers. Just me questioning my self , my worth and what I did so wrong . I cannot get myself out of this black hole. Please help.