Guy's Behavior

Why my ex bi boyfriend, who told me he loves me and that I'm 1 of 3 most important people in his life, still believe in lies that he heard?

My bisexual ex boyfriend was emotionally unavailable, had Little emotional intelligence and when we became serious he was afraid so he kept distance. But in most cases I felt happy with him. I believed that he is not bad person but only struggling. But when awful people told him lies about me but with a little truth (he knew that it was truth) he believed them. We talked on Snapchat but we never talked about it face to face. He recently after getting drunk send me "hi" on messenger but then delete it. He couldn't do it accidentally because we didn't use chat for years so I was very much below on list and we don't have each other in friends so I didn't show up on top in online friends. I didn't know what to do so I send him "ok..." I thought that it wasn't good respond because he could misinterpreted so I send him follow request on Instagram (to show that I would also agree to reconcile) and he blocked me. Why person who told me he cares now doesn't want to reconcile? I wonder because this awful people also showed to him that they are liars and despicable and I also showed that I help and care even when he left me. I would wants to know what to do? Give him another chance or accept that he is narccist?

Why my ex bi boyfriend, who told me he loves me and that I'm 1 of 3 most important people in his life, still believe in lies that he heard?
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