2 days after first date, only messaged me once.. Bad sign?

So I met with a guy from online the first time Saturday. Our date lasted 6 hours or so. He was VERY talkative the whole time but I was so shy and quiet, it was hard for me to open up. I felt bad but he said he didn’t mind.
When he dropped me off, he gave me this necklace he was wearing and said he’d see me again soon (no kiss). Then that night on Snapchat he sent me his phone number. I texted him the next day and said I had a great time, thanked him, hope to do it again, etc. He responded right away saying he couldn’t stop smiling after the date, slept so well, hasn’t felt like this is a long time and said he’d make time soon to see me again. I work M-F 7am to 4/5 pm, he works a night shift 6/8pm to 5/6 am. I messaged him great, I’d be out of town this coming weekend in response to his message.

So far nothing... His message seemed so positive but I’m just wondering why he doesn’t text me more?
2 days after first date, only messaged me once.. Bad sign?
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