For example, you were going to meet your boyfriend but then your mum told you no, you can't go out. You spend half an hour arguing with your mum just to get out of the house. After meeting up with your boyfriend, you guys fought over a small matter. Have you ever thought that hey, when your mum didn't want to allow you out, you should've listened. That way, you could've prevented that little spat between you and your boyfriend. 

Maybe the things around you that are happening are signs too. Like, you still love your ex and you're hoping that you guys will still get together someday. You go out and then find that the place you and your ex frequented has been torn down. The restaurant where you guys had your first date was replaced. The place where you guys met is going to be demolished. The place where you guys had the most fun is being renovated, and everything's replaced. Maybe they're all signs, telling you that it's time to move on. That whatever happened, they're all in the past. 

Who knows right? Ahahaha. Who knows...