My boyfriend said brb "be right back " and is been 5 hours and he hasn't come back .

So my boyfriend said to me brb " be right back " and I've been waiting 5 hours for him to come back ( were texting by the way ) and I haven't talked to him in a while . Can someone please tell me what this means , does he hate me , do I annoy him ? Please someone help , thank you . =)
My boyfriend said brb "be right back " and is been 5 hours and he hasn't come back .
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