Why is my ex boyfriend ignoring me and so uncomfortable around me?

Anonymous
I was in a relationship with a guy at work. It was all good. We never fought. We talked almost night and day in the first few months. Suddenly he started acting bit distant. When I asked he said he is busy. we started talking less and sometimes he avoided talking to me in office as well. My gut feeling said something was wrong. I felt he is losing interest in me. I wonder why. I am smart, intelligent and best looking girl on the floor. I really loved and trusted him. And he went for a holiday for couple of weeks. He was sending me one or two messages a day and then it turned to 2 to 3 days. Me not being used to it , confronted him in anger and asked him directly what is wrong. He should let me know if he not interested anymore instead of stringing me along. No response. And then after 3 days he replied but nothing related to what I had messaged. He completely ignored. I was disappointed and said I will talk once he is back. He did not respond again. After couple of days, I texted him again and he didn't respond. And he is back from holidays and is completely ignoring me. I asked him the reasons. He didn't answer. He dumped me without any explanation. Now he avoids me. Avoids eye contact. If he sees me walking towards him , he changes his direction. He is acting weird and I wonder why? I really dont understand his behavior and why I did not deserve any explanation. We could have talked and avoided this awkwardness but he never gave a chance. I am currently trying NC. I am not sure whether I should try talking to him again or let him go?
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Why is my ex boyfriend so uncomfortable around me?
Why is my ex boyfriend ignoring me and so uncomfortable around me?
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