As soon as I mentioned other men he immediately stops talking to me. Why🥹?

Yesterday, we were on FaceTime while he was at work and during he’s break I was explaining him why I broke up with my ex because he asked me. As soon as I was talking about my ex he ignored me and started talking to his colleges interrupting me every time and wouldn’t let me finish my story. (He was never this disrespectful) so I hanged up and told him I was going to get my nails done. We were fine and I asked him to help me choose the heels for my outfit. I was going out and he asked me with whom and I told him with my acquaintances , he immediately called and I couldn’t answer so he just said “have fun”. Later that night I texted him and he left me on read 😡🥹 and today he hasn’t call or text like we always do. I didn’t even do anything wrong. We’re nothing. We’re just talking. I’m starting to like him but I guess he’s loosing interest or is it jealousy? I won’t text him because i don’t like to bother people. I posted a video of the dinner where the sushi chef gave me sushi for free because I mean I can’t be faithful to someone if we’re nothing and I was hurt.
As soon as I mentioned other men he immediately stops talking to me. Why🥹?
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