Would a guy fake being in love with a girl?

he was so sweet and cared so much about me we talked for hours and everything was perfect then we had a fight and some misunderstanding in both sides we don't talk now for 3 weeks , he didn't even try to contact me ,, i send him happy year text that looks like broadcast to all my friends , to test him he didn't even open the message , what do you think is happening and do you think he was pretending to love me and never cared about me?
Would a guy fake being in love with a girl?
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