If someone wants to keep talking to you, they do. Being annoyed doesn’t usually turn into total silence, especially after weeks of daily messages, pictures, and sweetness. Adults don’t disappear when they care they explain, even briefly.
It’s possible he felt uncomfortable being questioned and didn’t want to deal with it. It’s also possible there is something else going on and this gave him an out. Either way, the result is the same: you’re left confused and waiting, and that’s not fair to you.
Try not to replay every sweet message and look for logic there. People can be warm one day and gone the next. That doesn’t mean you imagined it just that he wasn’t as steady as he seemed.
I’d stop reaching out for now. If he comes back with clarity, you can decide then. If he doesn’t, the silence already told you what you needed to know.