Why doesn’t my fiance answer my phone calls?

Anonymous
my fiance and i have been together for 10 years. since the beginning of October we have been arguing like crazy. i’ll admit im the one who argues. i am very insecure, im not confident and i think i am an anxious attachment style because i am always worried he will leave me or he doesn’t want to speak to me when he doesn’t respond to my phone calls or text msgs. some of the things we argue about is him liking girls butt and bikini pictures, he told me that our sex life is boring. the bikini and butt pictures i asked him why he did that to me and he said that he was in a bad place and he’s sorry. he no longer has instagram since last year. however in February he liked a girls butt picture on facebook so i still feel like he’s still doing it and i don’t like it. he ignored me this morning when i called him and when i texted him. i go on facebook and he is logged on. so i know he doesn’t want to talk to me anymore he just doesn’t want to tell me. I don't know what to do.
Why doesn’t my fiance answer my phone calls?
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