So a guy I was good friends with throughout university (we never dated) all of a sudden stopped communicating with me. We both applied to the same graduate program after uni. The first year we both got rejected. The second time he was accepted (along with a group of others) and I was once again rejected. There were no hard feelings, I congratulated him and was happy for him.

After he got into the program however, he randomly cut off all connection with me. I persisted reaching out to him for a while but got tired of the one way relationship so I stopped making an effort. Sure enough he made no attempt to connect and over time we stopped talking (in real life, and on social media). We both worked hard at uni (I was dux) and volunteered together. He knows I'd be happy for his achievement and I have never once said anything otherwise. I can't understand why he no longer wants anything to do with me.

I noticed the other day he untagged himself from a photo of us together on facebook (and he was the one that requested to be tagged in the photo in the first place!). I have done absolutely nothing to him. And the saddest part; after I was rejected I was obviously having a hard time and he never once asked me if I was doing okay.

I honestly have NO idea what would have triggered this behaviour but it seems like he's embarrassed he ever knew me and wants to pretend I never existed.

Any idea why he would act like this? I'm very disappointed and upset.