<human>: I was with my fiance for four years (one year engagement and 3 years of dating).

From the beginning I knew my fiance had anxiety and panic issues, specifically when flying planes, driving over bridges, going up elevators, hiking in the mountains, etc. This runs in his family. I asked him repeatedly over the years to get help but he did not. About 6 months after we got engaged he started having panic attacks almost daily and finally sought the help of a therapist. I asked him directly if this was related to getting married and he said no. I accepted his answer and figured the daily panic attacks were triggered by an incident he had on a plane around the same time.

Another six months later, around the holidays, he changed his tune. He started telling me that he believed his panic attacks were related to the engagement and impending marriage. He said he felt "lost" in our relationship and that he didn't feel like he could be himself around me. After a month of flip-flopping, he left, saying he needed to be on his own to figure himself out and that he didn't want our relationship anymore. 

This completely shocked me. I could not understand why he said he felt lost nor why he blamed the panic attacks on our relationship. I always supported him in his work and hobbies and I stood by him throughout years of panic episodes and anxiety. I was 100% committed to making our relationship work no matter what. I suggested couples counseling but he was not interested.

I don't know how I will ever be able to move on and trust anybody again, let alone consider marriage again. Everyone keeps telling me "I dodged a bullet" but instead I just feel like I was emotionally duped and I wasted four years of my life.

Can you give me the gist of the text in a nutshell?
<bot>: Fiance left after four years, blaming panic attacks and identity crisis on our relationship. How do I rebuild my life without him and learn to trust anyone again?