Why is he calling me at night?

I haven’t talk to my boyfriend much in days. He only replies to one or two of my texts then ignores the rest the whole day. Doesn’t answer calls either. Though he’s ignoring me, for the past days I keep waking up to missed calls from him at 1am, 3am, 11pm. He knows I’m not up around that time.
Why is he calling me at night?
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