Suggestions and Feedback

Hello guys,, i would like to ask for your suggestions and input!

I met this man in his 30s on ***. He seemed calm, mature, and said he wanted to build a future with me. He kept telling me he was serious-he even talked about marrying me. We texted every day, shared stories, even small things. He once changed his phone just so it'd be easier to talk with me.

But since the 27th, something changed. He reacted to one of my messages with a "thumbs up"... and then nothing. No messages, no greetings. Just silence. I've tried to be positive, thinking maybe he's just busy with work. But part of me is slowly breaking inside.

Am I holding on too much? Was he ever serious, or just sweet with words? I keep asking myself... should I wait, or should I start letting go?