I told my boyfriend to fuck off in anger?

I'm in a long-distance relationship. My boyfriend is usually busy with his work but we still had good communication, lately, he got even busier and rarely replied to my texts. I was trying to understand so I didn't say anything to him. One day I saw he's still active on all his social media. But I still tried to understand that he needs space and all so I tried to not bother him. So after a long time when we were talking properly, laughing and all he said he don't have enough battery on his phone. he was home back then, he could have charged his phone. I lost my temper and told him to fuckk off. He got offended by that and stopped talking to me. It's been 5 days already. I tried to apologise or start a conversation but he just say he's tired, busy or his mood isn't good. I even asked if he wants to break up but he denied it. what should I do?
I told my boyfriend to fuck off in anger?
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