Why does my fiance barely call me or text me anymore?

Hi everyone. My fiance have been dating for 8 years and engaged for two years. he used to call me and text me all the time and just recently i’ve noticed that he barely calls me or texts me anymore. The only thing i can think of that is pushing him away is that i nag and complain about instagram and him liking pictures. i’m a very insecure person and I don't know why. i’ve recently been seeing a therapist and she’s been giving me really good advice and helping me. I can tell little by little i will become confident. anyway, the past few months the only time i will call my fiance is to complain as to why he will follow this girl or like he bikini pictures. i will call for nothing else but to call and complain. the past month he has reassured me that he doesn’t do that anymore but i still call to ask if he is doing it. so i’ve come to notice that i call more often than he does and it makes me sad. so i just want to know your opinion and see if the reason he doesn’t call or text often anymore is because all i do is nag and complain. Also another thing is how can i stop complaining and want him to call me and text me more? Thank you in advance
Why does my fiance barely call me or text me anymore?
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