Why is he and his friends acting like this? Does he like me or not? What did I do wrong?

We met the first week of my sophomore year of highschool. Having a lot in common and being in the same group table made things go pretty well. I started to like him, but didn't tell anyone. A girl in the same group table even thought he liked me. Relationship or not, I just wanted to be his friend. We went out downtown in a group at a restaurant and thought the feeling was mutual but one day he just stopped talking to me. He started to avoid me. Whenever he saw me and we make eye contact he just runs away. He couldn't even look at me. I tried talking to him and even texted him if he wanted to do this and that but he was always "busy". I gave up and a year later we still haven't spoken a word to each other. I accepted that he didn't want anything to do with me and got over him.

I'm a junior now and today I ran into him during school for lunch at the same restaurant. He got really fidgety and his friends kept looking back at me. When I look at him he looks away. He got comfortable and started eating but a couple bites in he decides to get up, take his food to go and leave with his friend. I thought okay whatever. Ran into his friends in the hallway and they looked at me weird as I walked by. Maybe I over thought it but after school my sister and friends told me that he was waiting for his friend next to them. When my name was brought up in conversation, he seemed to have heard it and ran away. Minutes later I meet up with them and see him. He sees me and quickly looks away and crosses the street. His friends weren't even with him yet.. This wasn't the first time that this has happened. I thought I was overreacting at first but there were many cases when if anything involved me he runs away. I ask myself, what did I do wrong? I must have done something but I dont know what. I don't like how he always seems so uncomfortable around me. He simply just started to purposely avoid me a year ago, can't even look at me in the eye like he used to and I don't understand :/

Why is he and his friends acting like this? Does he like me or not? What did I do wrong?
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