Why do I still think about someone I use to be with before though.

[asiangal555]

I don't know why when ever I see back someone I use to be with before then I will think about when we were together. I mean it's not like I still like the person. Or I want to be back with him. When I see the person walking around somewhere then I will think about what we used to do though. I was just wondering if that's normal. Is there a way to not think about the person anymore. I am just trying to find someone I would like to be with.