Is it okay not hearing from him for days?

Me and my boyfriend are in a relationship for year and a half.. he’s cool.. when I’m with him his attention is all with me.. but he can spend day or couple days not texting or calling but when we’re together he is keen and loving. I didn’t want to be needy but I discussed it with him and he listened carefully to me and felt loved and said that he really loves me and want to marry me.. he always thinks about our future together and makes plans but is it normal to spend days without hearing my voice. When i call him he doesn’t answer.. Is it kinda mind game or guys usually do that! I hope anyone would help me as it’s my first relationship.
Is it okay not hearing from him for days?
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