Why did he leave me on read?

There’s this guy I’ve been talking to a lot recently. We just reconnected after almost a year and I’d say we’re a little bit more than friends. It’s been like almost 2 months now and I can tell by the way he texts that it’s a bit romantic. He always sends hearts of he always saves my snaps in chat commenting on how pretty I am. I try giving the same energy but not to a full extent. We had talked a bit today and as usual he saved my snap and said “damnnn y you so fine? I had to say it”. I finally felt like more comfortable enough to accept that we’re more than friends and I said good night with a heart “❤️” and he left me on read. Now it could’ve been an accident or he actually did it but now I’m just confused.
Why did he leave me on read?
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