Why committed boyfriend suddenly pulling away?

I’m in a serious relationship with my boyfriend. He’s always di the right thing & consistent. But lately we have argument about me developing trust issues with him. I even cried. Since then dynamic has been slightly shifting. He talk less , Less seeing me. i mean he still there, consistent. If i ask him too meet up he still goes, But i feel like he become less exited to see me. So i did a little pull away, and he just pull away further, then i talk to him more, he’s back talking like normal. But i feel like he becomes less perusing. Is it normal? , is he just need time to reset? or he just loose interest slowly bevause he doesn't like my behavior?
Why committed boyfriend suddenly pulling away?
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