Wrack your brain about why he hasn’t called
There are a million and one possible reasons why a man stops calling a woman that he’s seeing. Please don’t make it your business to mull over every single one. As tempting as it is, it’s an absolute waste of time and has the potential to leave you mentally drained. If and when he comes straight out and tells you what happened, that’s when you deal with it. Otherwise, it’s probably a good idea to use your brain for more productive purposes.