Why can’t guys act right?

My boyfriend, is hanging out and driving around this guy who tried to steal me from him? Like is there something wrong with my boyfriend? The guy that tried to take me from my boyfriend made it known to everyone that I should leave my boyfriend and go to him. My boyfriend knew this from day one. And now he is hanging out with him and acting like there cool when he was just talking all mess about him? What does this mean, because I’m extremely mad.
Why can’t guys act right?
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