Why is my boyfriend mad at me for chilling with a homie?

Basically I was chilling with my homeboy and my boyfriend saw, he knows that the guy I was chilling with is my homie but when I tried to wave at him he was looking down and left and I tried calling him and texting him but he's been ignoring all my texts and ignoring my phone calls, I don't understand what his problem is, what should I do?

Why is my boyfriend mad at me for chilling with a homie?
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