Should I message him?

I met a guy on the weekend, he asked for my email and phone number so that he could message me on Facebook, he said he would later that day when he finished work, it's been a few days and I haven't heard from him, he would be easy to find on Facebook as he is friends with people I know. If I did that and messaged him would he just think I'm some weird desperate stalker?
Should I message him?
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