Break Up & Divorce

Is it normal that my ex who said he truly loved me left me and felt out of love with me cause " I argue with him" and started to date his friend?

I argued cause while were long distance he did not want to video chat or call to me even on week- ends always had other priorities

Is it normal that my ex who said he truly loved me left me and felt out of love with me cause " I argue with him" and started to date his friend?
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