I sent him a message and he left me on read?

So me and this guy texted for four days straight and he left me on read so I decided not to text him until a week went by so I texted him yesterday and he was replying fast and then he left me on read for like ever and the thing is that on Twitter he was retweeting from me and I found that so rude... Like why do guys do this? Is he being an asshole/dick?
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By the way he got my number from a friend of mine
I sent him a message and he left me on read?
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