My boyfriend tells me he can't call me while he's visiting his family and friends. Why would he say he can't?

So when he goes home to visit family and friends (I have yet to meet them) he always tells me he can't call me when he's with his friends or family. I feel like he's embarrassed of me or he's cheating on me. I don't know what to think or do
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Edit: I ment to write he tells me he can't call me to say goodnight or good morning
My boyfriend tells me he can't call me while he's visiting his family and friends. Why would he say he can't?
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