What would cause a guy from being interested to all the sudden ignoring my messages?

For background, I've known this guy for a little while, we hung out a couple times and he was super respectful. Like he didn't try anything of the sort but like there was something in his smile that I swear made it seem like he was interested because it seemed so genuine and maybe it was a ploy but end of the day he had kissed my hand. like he was super interested seemingly, I mean cancelled plans to see me and such. He said I was funny and he was happy to be around me and excited and like now I don't know what to think.

Anyways, we hugged, kissed, cuddled, and eventually had sex, but everything was going fine, then oh I don't know Friday night, he like didn't respond to me for hours and eventually left me on opened. Saturday we had one conversation, and Sunday I just sent him a happy Easter and he responded at midnight and after that we snapped a little bit on Monday until I was left on opened again. Going on Wednesday now and he keeps opening my snaps and not responding and I don't know if I did something wrong or if he's seeing another chick or what because he did used to have good communication and now it's shit. 😪

Like he also said he doesn't talk to multiple people at once and or talk to multiple woman. He also said he gets attached really easy so I don't know maybe I'm just dumb but I just want a straightforward like if someone has done this what would be the reason? Especially not communicating with the other party? And why ignore someone to still keep them on everything if that "interest" isn't there? I'm sorry for my naivety.

What would cause a guy from being interested to all the sudden ignoring my messages?
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