I have/had a girlfriend (friend not mate) who would do this to me all the time. We’d make plans to meet and seconds before leaving the house with my keys in my hands she’d call and cancel for whatever random reason (typically involved the new guy she was seeing). Which left me with nothing to do for the night since we’d made plans. And when we would somehow manage to meet up and have a meal together to catch up she’d spend most of it f*ing around with her damn phone to ck her social media. I get that if you have kids or are on call, otherwise, put the phone away before I chuck it across the room. It is rude and disrespectful to your company. Finally I just turned the tables and would cancel on her and eventually stopped making plans with her altogether.