It's immature, lazy, and just very not-cool overall.
"If you have gone on one or two or three dates, not calling is breaking up, but after some kind of romantic and sexual encounters, it is a courtesy to call," Lieberman tells Web MD.
"Sometimes it's easier not to call, and there are people who will just run away," she admits.
Just let them know that you liked hanging out with them, but it's not really working out for you anymore so you think it's best to move on.
Image source:i Stock It's very possible that this person might have thought that what you were doing was much more serious than it was for you.
Image source:i Stock You might think that, since your relationship wasn't really official, it's okay for the breakup to not be totally official either. The relationship might not have been clearly defined, but the breakup definitely needs to be.