Would a 20 year old boy date a 17 year old girl?

Ok so we only saw each other once irl. And then we followed each other on Instagram. He likes my photos but won't text me because someone influenced him not to text me because I'm still in high school. Anyways I really want to dm him.. Would it be weird if I text him first? Please help..
Would a 20 year old boy date a 17 year old girl?
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